Home / 39,720.30-59,543.34-13,406.64

Finding the Fourth Proportional to 39,720.30, 59,543.34 and 13,406.64

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Solution

The fourth proportional to 39,720.30, 59,543.34 and 13,406.64 is: 20,097.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,720.30 : 59,543.34 = 13,406.64 : x
  2. Step 2: Convert to fraction form
    39,720.30/59,543.34 = 13,406.64/x
  3. Step 3: Cross multiply
    39,720.30x = 59,543.34 × 13,406.64
  4. Step 4: Simplify right side
    39,720.30x = 798,276,123.78
  5. Step 5: Solve for x
    x = 798,276,123.78/39,720.30
  6. Step 6: Final answer
    x = 20,097.43

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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.