Home / 10,721.92-15,987.80-10,006.96

Finding the Fourth Proportional to 10,721.92, 15,987.80 and 10,006.96

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Solution

The fourth proportional to 10,721.92, 15,987.80 and 10,006.96 is: 14,921.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,721.92 : 15,987.80 = 10,006.96 : x
  2. Step 2: Convert to fraction form
    10,721.92/15,987.80 = 10,006.96/x
  3. Step 3: Cross multiply
    10,721.92x = 15,987.80 × 10,006.96
  4. Step 4: Simplify right side
    10,721.92x = 159,989,275.09
  5. Step 5: Solve for x
    x = 159,989,275.09/10,721.92
  6. Step 6: Final answer
    x = 14,921.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.