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Finding the Fourth Proportional to 10,491.17, 15,728.90 and 6,330.20

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Solution

The fourth proportional to 10,491.17, 15,728.90 and 6,330.20 is: 9,490.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,491.17 : 15,728.90 = 6,330.20 : x
  2. Step 2: Convert to fraction form
    10,491.17/15,728.90 = 6,330.20/x
  3. Step 3: Cross multiply
    10,491.17x = 15,728.90 × 6,330.20
  4. Step 4: Simplify right side
    10,491.17x = 99,567,027.63
  5. Step 5: Solve for x
    x = 99,567,027.63/10,491.17
  6. Step 6: Final answer
    x = 9,490.55

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1.5x scale

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.