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Finding the Fourth Proportional to 9,915, 14,864.76 and 5,228.88

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Solution

The fourth proportional to 9,915, 14,864.76 and 5,228.88 is: 7,839.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,915 : 14,864.76 = 5,228.88 : x
  2. Step 2: Convert to fraction form
    9,915/14,864.76 = 5,228.88/x
  3. Step 3: Cross multiply
    9,915x = 14,864.76 × 5,228.88
  4. Step 4: Simplify right side
    9,915x = 77,726,046.27
  5. Step 5: Solve for x
    x = 77,726,046.27/9,915
  6. Step 6: Final answer
    x = 7,839.24

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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.