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Finding the Fourth Proportional to 28,585.70, 42,882.71 and 8,865.85

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Solution

The fourth proportional to 28,585.70, 42,882.71 and 8,865.85 is: 13,300.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,585.70 : 42,882.71 = 8,865.85 : x
  2. Step 2: Convert to fraction form
    28,585.70/42,882.71 = 8,865.85/x
  3. Step 3: Cross multiply
    28,585.70x = 42,882.71 × 8,865.85
  4. Step 4: Simplify right side
    28,585.70x = 380,191,522.92
  5. Step 5: Solve for x
    x = 380,191,522.92/28,585.70
  6. Step 6: Final answer
    x = 13,300.06

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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.