Home / 20,981.92-28,964.12-15,003.20

Finding the Fourth Proportional to 20,981.92, 28,964.12 and 15,003.20

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Solution

The fourth proportional to 20,981.92, 28,964.12 and 15,003.20 is: 20,710.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,981.92 : 28,964.12 = 15,003.20 : x
  2. Step 2: Convert to fraction form
    20,981.92/28,964.12 = 15,003.20/x
  3. Step 3: Cross multiply
    20,981.92x = 28,964.12 × 15,003.20
  4. Step 4: Simplify right side
    20,981.92x = 434,554,485.18
  5. Step 5: Solve for x
    x = 434,554,485.18/20,981.92
  6. Step 6: Final answer
    x = 20,710.90

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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.