Home / 42,981.71-64,469.50-11,391.06

Finding the Fourth Proportional to 42,981.71, 64,469.50 and 11,391.06

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Solution

The fourth proportional to 42,981.71, 64,469.50 and 11,391.06 is: 17,085.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,981.71 : 64,469.50 = 11,391.06 : x
  2. Step 2: Convert to fraction form
    42,981.71/64,469.50 = 11,391.06/x
  3. Step 3: Cross multiply
    42,981.71x = 64,469.50 × 11,391.06
  4. Step 4: Simplify right side
    42,981.71x = 734,376,220.03
  5. Step 5: Solve for x
    x = 734,376,220.03/42,981.71
  6. Step 6: Final answer
    x = 17,085.79

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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.