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Finding the Fourth Proportional to 28,423.56, 42,642.10 and 8,701.98

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Solution

The fourth proportional to 28,423.56, 42,642.10 and 8,701.98 is: 13,055.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,423.56 : 42,642.10 = 8,701.98 : x
  2. Step 2: Convert to fraction form
    28,423.56/42,642.10 = 8,701.98/x
  3. Step 3: Cross multiply
    28,423.56x = 42,642.10 × 8,701.98
  4. Step 4: Simplify right side
    28,423.56x = 371,070,743.24
  5. Step 5: Solve for x
    x = 371,070,743.24/28,423.56
  6. Step 6: Final answer
    x = 13,055.04

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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.