Home / 12,455.64-18,678.06-3,688.20

Finding the Fourth Proportional to 12,455.64, 18,678.06 and 3,688.20

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Solution

The fourth proportional to 12,455.64, 18,678.06 and 3,688.20 is: 5,530.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,455.64 : 18,678.06 = 3,688.20 : x
  2. Step 2: Convert to fraction form
    12,455.64/18,678.06 = 3,688.20/x
  3. Step 3: Cross multiply
    12,455.64x = 18,678.06 × 3,688.20
  4. Step 4: Simplify right side
    12,455.64x = 68,888,420.89
  5. Step 5: Solve for x
    x = 68,888,420.89/12,455.64
  6. Step 6: Final answer
    x = 5,530.70

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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.