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Finding the Fourth Proportional to 28,582.77, 42,872.52 and 8,860.71

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Solution

The fourth proportional to 28,582.77, 42,872.52 and 8,860.71 is: 13,290.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,582.77 : 42,872.52 = 8,860.71 : x
  2. Step 2: Convert to fraction form
    28,582.77/42,872.52 = 8,860.71/x
  3. Step 3: Cross multiply
    28,582.77x = 42,872.52 × 8,860.71
  4. Step 4: Simplify right side
    28,582.77x = 379,880,966.69
  5. Step 5: Solve for x
    x = 379,880,966.69/28,582.77
  6. Step 6: Final answer
    x = 13,290.56

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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.