Home / 12,455,643.10-18,683,464.65-7,647,742.30

Finding the Fourth Proportional to 12,455,643.10, 18,683,464.65 and 7,647,742.30

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Solution

The fourth proportional to 12,455,643.10, 18,683,464.65 and 7,647,742.30 is: 11,471,613.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,455,643.10 : 18,683,464.65 = 7,647,742.30 : x
  2. Step 2: Convert to fraction form
    12,455,643.10/18,683,464.65 = 7,647,742.30/x
  3. Step 3: Cross multiply
    12,455,643.10x = 18,683,464.65 × 7,647,742.30
  4. Step 4: Simplify right side
    12,455,643.10x = 142,886,322,914,359.69
  5. Step 5: Solve for x
    x = 142,886,322,914,359.69/12,455,643.10
  6. Step 6: Final answer
    x = 11,471,613.45

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.