Home / 20,818.71-31,238.30-9,723.78

Finding the Fourth Proportional to 20,818.71, 31,238.30 and 9,723.78

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Solution

The fourth proportional to 20,818.71, 31,238.30 and 9,723.78 is: 14,590.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,818.71 : 31,238.30 = 9,723.78 : x
  2. Step 2: Convert to fraction form
    20,818.71/31,238.30 = 9,723.78/x
  3. Step 3: Cross multiply
    20,818.71x = 31,238.30 × 9,723.78
  4. Step 4: Simplify right side
    20,818.71x = 303,754,381.08
  5. Step 5: Solve for x
    x = 303,754,381.08/20,818.71
  6. Step 6: Final answer
    x = 14,590.45

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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.