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Finding the Fourth Proportional to 55,142.30, 82,713.45 and 13,589.30

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Solution

The fourth proportional to 55,142.30, 82,713.45 and 13,589.30 is: 20,383.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,142.30 : 82,713.45 = 13,589.30 : x
  2. Step 2: Convert to fraction form
    55,142.30/82,713.45 = 13,589.30/x
  3. Step 3: Cross multiply
    55,142.30x = 82,713.45 × 13,589.30
  4. Step 4: Simplify right side
    55,142.30x = 1,124,017,563.91
  5. Step 5: Solve for x
    x = 1,124,017,563.91/55,142.30
  6. Step 6: Final answer
    x = 20,383.95

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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.