Home / 39,420.10-54,400.92-21,516.28

Finding the Fourth Proportional to 39,420.10, 54,400.92 and 21,516.28

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Solution

The fourth proportional to 39,420.10, 54,400.92 and 21,516.28 is: 29,693.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,420.10 : 54,400.92 = 21,516.28 : x
  2. Step 2: Convert to fraction form
    39,420.10/54,400.92 = 21,516.28/x
  3. Step 3: Cross multiply
    39,420.10x = 54,400.92 × 21,516.28
  4. Step 4: Simplify right side
    39,420.10x = 1,170,505,426.98
  5. Step 5: Solve for x
    x = 1,170,505,426.98/39,420.10
  6. Step 6: Final answer
    x = 29,693.11

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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.