Home / 20,981.64-31,472.72-8,334.52

Finding the Fourth Proportional to 20,981.64, 31,472.72 and 8,334.52

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Solution

The fourth proportional to 20,981.64, 31,472.72 and 8,334.52 is: 12,501.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,981.64 : 31,472.72 = 8,334.52 : x
  2. Step 2: Convert to fraction form
    20,981.64/31,472.72 = 8,334.52/x
  3. Step 3: Cross multiply
    20,981.64x = 31,472.72 × 8,334.52
  4. Step 4: Simplify right side
    20,981.64x = 262,310,014.29
  5. Step 5: Solve for x
    x = 262,310,014.29/20,981.64
  6. Step 6: Final answer
    x = 12,501.88

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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.