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Finding the Fourth Proportional to 20,184.80, 30,279.90 and 7,041.20

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Solution

The fourth proportional to 20,184.80, 30,279.90 and 7,041.20 is: 10,562.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,184.80 : 30,279.90 = 7,041.20 : x
  2. Step 2: Convert to fraction form
    20,184.80/30,279.90 = 7,041.20/x
  3. Step 3: Cross multiply
    20,184.80x = 30,279.90 × 7,041.20
  4. Step 4: Simplify right side
    20,184.80x = 213,206,831.88
  5. Step 5: Solve for x
    x = 213,206,831.88/20,184.80
  6. Step 6: Final answer
    x = 10,562.74

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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.