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Finding the Fourth Proportional to 20,400.71, 30,593.27 and 7,919.12

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Solution

The fourth proportional to 20,400.71, 30,593.27 and 7,919.12 is: 11,875.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,400.71 : 30,593.27 = 7,919.12 : x
  2. Step 2: Convert to fraction form
    20,400.71/30,593.27 = 7,919.12/x
  3. Step 3: Cross multiply
    20,400.71x = 30,593.27 × 7,919.12
  4. Step 4: Simplify right side
    20,400.71x = 242,271,655.97
  5. Step 5: Solve for x
    x = 242,271,655.97/20,400.71
  6. Step 6: Final answer
    x = 11,875.65

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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.