Home / 39,420.30-59,139.90-13,125.28

Finding the Fourth Proportional to 39,420.30, 59,139.90 and 13,125.28

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Solution

The fourth proportional to 39,420.30, 59,139.90 and 13,125.28 is: 19,691.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,420.30 : 59,139.90 = 13,125.28 : x
  2. Step 2: Convert to fraction form
    39,420.30/59,139.90 = 13,125.28/x
  3. Step 3: Cross multiply
    39,420.30x = 59,139.90 × 13,125.28
  4. Step 4: Simplify right side
    39,420.30x = 776,227,746.67
  5. Step 5: Solve for x
    x = 776,227,746.67/39,420.30
  6. Step 6: Final answer
    x = 19,691.07

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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.