Home / 12,742.58-17,585.19-7,077.40

Finding the Fourth Proportional to 12,742.58, 17,585.19 and 7,077.40

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Solution

The fourth proportional to 12,742.58, 17,585.19 and 7,077.40 is: 9,767.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,742.58 : 17,585.19 = 7,077.40 : x
  2. Step 2: Convert to fraction form
    12,742.58/17,585.19 = 7,077.40/x
  3. Step 3: Cross multiply
    12,742.58x = 17,585.19 × 7,077.40
  4. Step 4: Simplify right side
    12,742.58x = 124,457,379.74
  5. Step 5: Solve for x
    x = 124,457,379.74/12,742.58
  6. Step 6: Final answer
    x = 9,767.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.