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Finding the Fourth Proportional to 28,590.66, 42,882.30 and 8,868.78

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Solution

The fourth proportional to 28,590.66, 42,882.30 and 8,868.78 is: 13,302.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,590.66 : 42,882.30 = 8,868.78 : x
  2. Step 2: Convert to fraction form
    28,590.66/42,882.30 = 8,868.78/x
  3. Step 3: Cross multiply
    28,590.66x = 42,882.30 × 8,868.78
  4. Step 4: Simplify right side
    28,590.66x = 380,313,684.59
  5. Step 5: Solve for x
    x = 380,313,684.59/28,590.66
  6. Step 6: Final answer
    x = 13,302.03

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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.