Home / 28,082.19-42,131.16-12,288.60

Finding the Fourth Proportional to 28,082.19, 42,131.16 and 12,288.60

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Solution

The fourth proportional to 28,082.19, 42,131.16 and 12,288.60 is: 18,436.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,082.19 : 42,131.16 = 12,288.60 : x
  2. Step 2: Convert to fraction form
    28,082.19/42,131.16 = 12,288.60/x
  3. Step 3: Cross multiply
    28,082.19x = 42,131.16 × 12,288.60
  4. Step 4: Simplify right side
    28,082.19x = 517,732,972.78
  5. Step 5: Solve for x
    x = 517,732,972.78/28,082.19
  6. Step 6: Final answer
    x = 18,436.35

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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.