Home / 20,954.20-31,377.78-20,330.86

Finding the Fourth Proportional to 20,954.20, 31,377.78 and 20,330.86

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Solution

The fourth proportional to 20,954.20, 31,377.78 and 20,330.86 is: 30,444.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,954.20 : 31,377.78 = 20,330.86 : x
  2. Step 2: Convert to fraction form
    20,954.20/31,377.78 = 20,330.86/x
  3. Step 3: Cross multiply
    20,954.20x = 31,377.78 × 20,330.86
  4. Step 4: Simplify right side
    20,954.20x = 637,937,252.29
  5. Step 5: Solve for x
    x = 637,937,252.29/20,954.20
  6. Step 6: Final answer
    x = 30,444.36

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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.