Home / 20,774.20-28,665.01-12,275.14

Finding the Fourth Proportional to 20,774.20, 28,665.01 and 12,275.14

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Solution

The fourth proportional to 20,774.20, 28,665.01 and 12,275.14 is: 16,937.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,774.20 : 28,665.01 = 12,275.14 : x
  2. Step 2: Convert to fraction form
    20,774.20/28,665.01 = 12,275.14/x
  3. Step 3: Cross multiply
    20,774.20x = 28,665.01 × 12,275.14
  4. Step 4: Simplify right side
    20,774.20x = 351,866,908.50
  5. Step 5: Solve for x
    x = 351,866,908.50/20,774.20
  6. Step 6: Final answer
    x = 16,937.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.