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Finding the Fourth Proportional to 55,869.60, 83,780.10 and 18,415.20

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Solution

The fourth proportional to 55,869.60, 83,780.10 and 18,415.20 is: 27,614.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,869.60 : 83,780.10 = 18,415.20 : x
  2. Step 2: Convert to fraction form
    55,869.60/83,780.10 = 18,415.20/x
  3. Step 3: Cross multiply
    55,869.60x = 83,780.10 × 18,415.20
  4. Step 4: Simplify right side
    55,869.60x = 1,542,827,297.52
  5. Step 5: Solve for x
    x = 1,542,827,297.52/55,869.60
  6. Step 6: Final answer
    x = 27,614.79

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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.