Home / 42,979.13-64,461.61-11,391.15

Finding the Fourth Proportional to 42,979.13, 64,461.61 and 11,391.15

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Solution

The fourth proportional to 42,979.13, 64,461.61 and 11,391.15 is: 17,084.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,979.13 : 64,461.61 = 11,391.15 : x
  2. Step 2: Convert to fraction form
    42,979.13/64,461.61 = 11,391.15/x
  3. Step 3: Cross multiply
    42,979.13x = 64,461.61 × 11,391.15
  4. Step 4: Simplify right side
    42,979.13x = 734,291,840.27
  5. Step 5: Solve for x
    x = 734,291,840.27/42,979.13
  6. Step 6: Final answer
    x = 17,084.85

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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.