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Finding the Fourth Proportional to 19,443.60, 29,179.60 and 7,760.16

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Solution

The fourth proportional to 19,443.60, 29,179.60 and 7,760.16 is: 11,645.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,443.60 : 29,179.60 = 7,760.16 : x
  2. Step 2: Convert to fraction form
    19,443.60/29,179.60 = 7,760.16/x
  3. Step 3: Cross multiply
    19,443.60x = 29,179.60 × 7,760.16
  4. Step 4: Simplify right side
    19,443.60x = 226,438,364.74
  5. Step 5: Solve for x
    x = 226,438,364.74/19,443.60
  6. Step 6: Final answer
    x = 11,645.91

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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.