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Finding the Fourth Proportional to 55,211.20, 82,816.80 and 13,658.20

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Solution

The fourth proportional to 55,211.20, 82,816.80 and 13,658.20 is: 20,487.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,211.20 : 82,816.80 = 13,658.20 : x
  2. Step 2: Convert to fraction form
    55,211.20/82,816.80 = 13,658.20/x
  3. Step 3: Cross multiply
    55,211.20x = 82,816.80 × 13,658.20
  4. Step 4: Simplify right side
    55,211.20x = 1,131,128,417.76
  5. Step 5: Solve for x
    x = 1,131,128,417.76/55,211.20
  6. Step 6: Final answer
    x = 20,487.30

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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.