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Finding the Fourth Proportional to 28,563.49, 42,851.49 and 8,572.15

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Solution

The fourth proportional to 28,563.49, 42,851.49 and 8,572.15 is: 12,860.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,563.49 : 42,851.49 = 8,572.15 : x
  2. Step 2: Convert to fraction form
    28,563.49/42,851.49 = 8,572.15/x
  3. Step 3: Cross multiply
    28,563.49x = 42,851.49 × 8,572.15
  4. Step 4: Simplify right side
    28,563.49x = 367,329,400.00
  5. Step 5: Solve for x
    x = 367,329,400.00/28,563.49
  6. Step 6: Final answer
    x = 12,860.10

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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.