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Finding the Fourth Proportional to 19,519.60, 29,279.40 and 9,660.40

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Solution

The fourth proportional to 19,519.60, 29,279.40 and 9,660.40 is: 14,490.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,519.60 : 29,279.40 = 9,660.40 : x
  2. Step 2: Convert to fraction form
    19,519.60/29,279.40 = 9,660.40/x
  3. Step 3: Cross multiply
    19,519.60x = 29,279.40 × 9,660.40
  4. Step 4: Simplify right side
    19,519.60x = 282,850,715.76
  5. Step 5: Solve for x
    x = 282,850,715.76/19,519.60
  6. Step 6: Final answer
    x = 14,490.60

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1.5x scale

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.