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Finding the Fourth Proportional to 28,312.76, 42,466.97 and 8,591.42

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Solution

The fourth proportional to 28,312.76, 42,466.97 and 8,591.42 is: 12,886.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,312.76 : 42,466.97 = 8,591.42 : x
  2. Step 2: Convert to fraction form
    28,312.76/42,466.97 = 8,591.42/x
  3. Step 3: Cross multiply
    28,312.76x = 42,466.97 × 8,591.42
  4. Step 4: Simplify right side
    28,312.76x = 364,851,320.11
  5. Step 5: Solve for x
    x = 364,851,320.11/28,312.76
  6. Step 6: Final answer
    x = 12,886.46

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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.