Home / 20,689.49-31,034.31-13,713.81

Finding the Fourth Proportional to 20,689.49, 31,034.31 and 13,713.81

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Solution

The fourth proportional to 20,689.49, 31,034.31 and 13,713.81 is: 20,570.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,689.49 : 31,034.31 = 13,713.81 : x
  2. Step 2: Convert to fraction form
    20,689.49/31,034.31 = 13,713.81/x
  3. Step 3: Cross multiply
    20,689.49x = 31,034.31 × 13,713.81
  4. Step 4: Simplify right side
    20,689.49x = 425,598,463.02
  5. Step 5: Solve for x
    x = 425,598,463.02/20,689.49
  6. Step 6: Final answer
    x = 20,570.75

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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.