Home / 28,489.85-42,700.64-13,271.90

Finding the Fourth Proportional to 28,489.85, 42,700.64 and 13,271.90

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Solution

The fourth proportional to 28,489.85, 42,700.64 and 13,271.90 is: 19,891.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,489.85 : 42,700.64 = 13,271.90 : x
  2. Step 2: Convert to fraction form
    28,489.85/42,700.64 = 13,271.90/x
  3. Step 3: Cross multiply
    28,489.85x = 42,700.64 × 13,271.90
  4. Step 4: Simplify right side
    28,489.85x = 566,718,696.33
  5. Step 5: Solve for x
    x = 566,718,696.33/28,489.85
  6. Step 6: Final answer
    x = 19,891.95

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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.