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Finding the Fourth Proportional to 15,508.80, 23,320.80 and 12,974.40

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Solution

The fourth proportional to 15,508.80, 23,320.80 and 12,974.40 is: 19,509.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,508.80 : 23,320.80 = 12,974.40 : x
  2. Step 2: Convert to fraction form
    15,508.80/23,320.80 = 12,974.40/x
  3. Step 3: Cross multiply
    15,508.80x = 23,320.80 × 12,974.40
  4. Step 4: Simplify right side
    15,508.80x = 302,573,387.52
  5. Step 5: Solve for x
    x = 302,573,387.52/15,508.80
  6. Step 6: Final answer
    x = 19,509.79

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.