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Finding the Fourth Proportional to 28,483.50, 42,723.96 and 8,761.20

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Solution

The fourth proportional to 28,483.50, 42,723.96 and 8,761.20 is: 13,141.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,483.50 : 42,723.96 = 8,761.20 : x
  2. Step 2: Convert to fraction form
    28,483.50/42,723.96 = 8,761.20/x
  3. Step 3: Cross multiply
    28,483.50x = 42,723.96 × 8,761.20
  4. Step 4: Simplify right side
    28,483.50x = 374,313,158.35
  5. Step 5: Solve for x
    x = 374,313,158.35/28,483.50
  6. Step 6: Final answer
    x = 13,141.40

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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.