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Finding the Fourth Proportional to 28,502.33, 42,758.09 and 8,780.88

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Solution

The fourth proportional to 28,502.33, 42,758.09 and 8,780.88 is: 13,172.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,502.33 : 42,758.09 = 8,780.88 : x
  2. Step 2: Convert to fraction form
    28,502.33/42,758.09 = 8,780.88/x
  3. Step 3: Cross multiply
    28,502.33x = 42,758.09 × 8,780.88
  4. Step 4: Simplify right side
    28,502.33x = 375,453,657.32
  5. Step 5: Solve for x
    x = 375,453,657.32/28,502.33
  6. Step 6: Final answer
    x = 13,172.74

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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.