Home / 20,943.49-31,385.42-10,403.18

Finding the Fourth Proportional to 20,943.49, 31,385.42 and 10,403.18

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Solution

The fourth proportional to 20,943.49, 31,385.42 and 10,403.18 is: 15,589.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,943.49 : 31,385.42 = 10,403.18 : x
  2. Step 2: Convert to fraction form
    20,943.49/31,385.42 = 10,403.18/x
  3. Step 3: Cross multiply
    20,943.49x = 31,385.42 × 10,403.18
  4. Step 4: Simplify right side
    20,943.49x = 326,508,173.64
  5. Step 5: Solve for x
    x = 326,508,173.64/20,943.49
  6. Step 6: Final answer
    x = 15,589.96

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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.