Home / 28,618.12-42,943.92-11,976.76

Finding the Fourth Proportional to 28,618.12, 42,943.92 and 11,976.76

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Solution

The fourth proportional to 28,618.12, 42,943.92 and 11,976.76 is: 17,972.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,618.12 : 42,943.92 = 11,976.76 : x
  2. Step 2: Convert to fraction form
    28,618.12/42,943.92 = 11,976.76/x
  3. Step 3: Cross multiply
    28,618.12x = 42,943.92 × 11,976.76
  4. Step 4: Simplify right side
    28,618.12x = 514,329,023.30
  5. Step 5: Solve for x
    x = 514,329,023.30/28,618.12
  6. Step 6: Final answer
    x = 17,972.15

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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.