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Finding the Fourth Proportional to 28,445.68, 42,664.76 and 8,454.76

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Solution

The fourth proportional to 28,445.68, 42,664.76 and 8,454.76 is: 12,681.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,445.68 : 42,664.76 = 8,454.76 : x
  2. Step 2: Convert to fraction form
    28,445.68/42,664.76 = 8,454.76/x
  3. Step 3: Cross multiply
    28,445.68x = 42,664.76 × 8,454.76
  4. Step 4: Simplify right side
    28,445.68x = 360,720,306.26
  5. Step 5: Solve for x
    x = 360,720,306.26/28,445.68
  6. Step 6: Final answer
    x = 12,681.02

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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.