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Finding the Fourth Proportional to 28,082.61, 42,123.92 and 19,290.87

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Solution

The fourth proportional to 28,082.61, 42,123.92 and 19,290.87 is: 28,936.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,082.61 : 42,123.92 = 19,290.87 : x
  2. Step 2: Convert to fraction form
    28,082.61/42,123.92 = 19,290.87/x
  3. Step 3: Cross multiply
    28,082.61x = 42,123.92 × 19,290.87
  4. Step 4: Simplify right side
    28,082.61x = 812,606,968.16
  5. Step 5: Solve for x
    x = 812,606,968.16/28,082.61
  6. Step 6: Final answer
    x = 28,936.31

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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.