Home / 19,443.20-29,164.80-7,129.60

Finding the Fourth Proportional to 19,443.20, 29,164.80 and 7,129.60

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Solution

The fourth proportional to 19,443.20, 29,164.80 and 7,129.60 is: 10,694.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,443.20 : 29,164.80 = 7,129.60 : x
  2. Step 2: Convert to fraction form
    19,443.20/29,164.80 = 7,129.60/x
  3. Step 3: Cross multiply
    19,443.20x = 29,164.80 × 7,129.60
  4. Step 4: Simplify right side
    19,443.20x = 207,933,358.08
  5. Step 5: Solve for x
    x = 207,933,358.08/19,443.20
  6. Step 6: Final answer
    x = 10,694.40

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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.