Home / 15,721.11-21,695.49-9,007.38

Finding the Fourth Proportional to 15,721.11, 21,695.49 and 9,007.38

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Solution

The fourth proportional to 15,721.11, 21,695.49 and 9,007.38 is: 12,430.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,721.11 : 21,695.49 = 9,007.38 : x
  2. Step 2: Convert to fraction form
    15,721.11/21,695.49 = 9,007.38/x
  3. Step 3: Cross multiply
    15,721.11x = 21,695.49 × 9,007.38
  4. Step 4: Simplify right side
    15,721.11x = 195,419,522.72
  5. Step 5: Solve for x
    x = 195,419,522.72/15,721.11
  6. Step 6: Final answer
    x = 12,430.39

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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.