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Finding the Fourth Proportional to 19,687.52, 29,503.62 and 10,779.98

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Solution

The fourth proportional to 19,687.52, 29,503.62 and 10,779.98 is: 16,154.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,687.52 : 29,503.62 = 10,779.98 : x
  2. Step 2: Convert to fraction form
    19,687.52/29,503.62 = 10,779.98/x
  3. Step 3: Cross multiply
    19,687.52x = 29,503.62 × 10,779.98
  4. Step 4: Simplify right side
    19,687.52x = 318,048,433.53
  5. Step 5: Solve for x
    x = 318,048,433.53/19,687.52
  6. Step 6: Final answer
    x = 16,154.82

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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.