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Finding the Fourth Proportional to 6,624.72, 9,929.79 and 4,428

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Solution

The fourth proportional to 6,624.72, 9,929.79 and 4,428 is: 6,637.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,624.72 : 9,929.79 = 4,428 : x
  2. Step 2: Convert to fraction form
    6,624.72/9,929.79 = 4,428/x
  3. Step 3: Cross multiply
    6,624.72x = 9,929.79 × 4,428
  4. Step 4: Simplify right side
    6,624.72x = 43,969,110.12
  5. Step 5: Solve for x
    x = 43,969,110.12/6,624.72
  6. Step 6: Final answer
    x = 6,637.13

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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.