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Finding the Fourth Proportional to 14,987.08, 20,654.76 and 9,942.40

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Solution

The fourth proportional to 14,987.08, 20,654.76 and 9,942.40 is: 13,702.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,987.08 : 20,654.76 = 9,942.40 : x
  2. Step 2: Convert to fraction form
    14,987.08/20,654.76 = 9,942.40/x
  3. Step 3: Cross multiply
    14,987.08x = 20,654.76 × 9,942.40
  4. Step 4: Simplify right side
    14,987.08x = 205,357,885.82
  5. Step 5: Solve for x
    x = 205,357,885.82/14,987.08
  6. Step 6: Final answer
    x = 13,702.33

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1.5x scale

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.