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Finding the Fourth Proportional to 15,898.62, 21,939.06 and 9,929.94

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Solution

The fourth proportional to 15,898.62, 21,939.06 and 9,929.94 is: 13,702.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,898.62 : 21,939.06 = 9,929.94 : x
  2. Step 2: Convert to fraction form
    15,898.62/21,939.06 = 9,929.94/x
  3. Step 3: Cross multiply
    15,898.62x = 21,939.06 × 9,929.94
  4. Step 4: Simplify right side
    15,898.62x = 217,853,549.46
  5. Step 5: Solve for x
    x = 217,853,549.46/15,898.62
  6. Step 6: Final answer
    x = 13,702.67

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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.