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Finding the Fourth Proportional to 28,295.76, 42,441.84 and 8,574.96

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Solution

The fourth proportional to 28,295.76, 42,441.84 and 8,574.96 is: 12,861.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,295.76 : 42,441.84 = 8,574.96 : x
  2. Step 2: Convert to fraction form
    28,295.76/42,441.84 = 8,574.96/x
  3. Step 3: Cross multiply
    28,295.76x = 42,441.84 × 8,574.96
  4. Step 4: Simplify right side
    28,295.76x = 363,937,080.33
  5. Step 5: Solve for x
    x = 363,937,080.33/28,295.76
  6. Step 6: Final answer
    x = 12,861.89

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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.