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Finding the Fourth Proportional to 28,608.49, 42,898.90 and 9,881.97

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Solution

The fourth proportional to 28,608.49, 42,898.90 and 9,881.97 is: 14,818.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,608.49 : 42,898.90 = 9,881.97 : x
  2. Step 2: Convert to fraction form
    28,608.49/42,898.90 = 9,881.97/x
  3. Step 3: Cross multiply
    28,608.49x = 42,898.90 × 9,881.97
  4. Step 4: Simplify right side
    28,608.49x = 423,925,475.79
  5. Step 5: Solve for x
    x = 423,925,475.79/28,608.49
  6. Step 6: Final answer
    x = 14,818.17

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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.