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Finding the Fourth Proportional to 18,429.60, 27,644.40 and 5,281.20

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Solution

The fourth proportional to 18,429.60, 27,644.40 and 5,281.20 is: 7,921.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,429.60 : 27,644.40 = 5,281.20 : x
  2. Step 2: Convert to fraction form
    18,429.60/27,644.40 = 5,281.20/x
  3. Step 3: Cross multiply
    18,429.60x = 27,644.40 × 5,281.20
  4. Step 4: Simplify right side
    18,429.60x = 145,995,605.28
  5. Step 5: Solve for x
    x = 145,995,605.28/18,429.60
  6. Step 6: Final answer
    x = 7,921.80

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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.