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Finding the Fourth Proportional to 28,582.57, 42,872.91 and 8,860.69

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Solution

The fourth proportional to 28,582.57, 42,872.91 and 8,860.69 is: 13,290.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,582.57 : 42,872.91 = 8,860.69 : x
  2. Step 2: Convert to fraction form
    28,582.57/42,872.91 = 8,860.69/x
  3. Step 3: Cross multiply
    28,582.57x = 42,872.91 × 8,860.69
  4. Step 4: Simplify right side
    28,582.57x = 379,883,564.91
  5. Step 5: Solve for x
    x = 379,883,564.91/28,582.57
  6. Step 6: Final answer
    x = 13,290.74

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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.