Home / 15,715.24-21,680.89-8,997.28

Finding the Fourth Proportional to 15,715.24, 21,680.89 and 8,997.28

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Solution

The fourth proportional to 15,715.24, 21,680.89 and 8,997.28 is: 12,412.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,715.24 : 21,680.89 = 8,997.28 : x
  2. Step 2: Convert to fraction form
    15,715.24/21,680.89 = 8,997.28/x
  3. Step 3: Cross multiply
    15,715.24x = 21,680.89 × 8,997.28
  4. Step 4: Simplify right side
    15,715.24x = 195,068,961.28
  5. Step 5: Solve for x
    x = 195,068,961.28/15,715.24
  6. Step 6: Final answer
    x = 12,412.73

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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.