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Finding the Fourth Proportional to 14,472.34, 21,698 and 9,780.72

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Solution

The fourth proportional to 14,472.34, 21,698 and 9,780.72 is: 14,663.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,472.34 : 21,698 = 9,780.72 : x
  2. Step 2: Convert to fraction form
    14,472.34/21,698 = 9,780.72/x
  3. Step 3: Cross multiply
    14,472.34x = 21,698 × 9,780.72
  4. Step 4: Simplify right side
    14,472.34x = 212,222,062.56
  5. Step 5: Solve for x
    x = 212,222,062.56/14,472.34
  6. Step 6: Final answer
    x = 14,663.98

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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.