Home / 20,986.68-28,966.56-13,034.91

Finding the Fourth Proportional to 20,986.68, 28,966.56 and 13,034.91

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Solution

The fourth proportional to 20,986.68, 28,966.56 and 13,034.91 is: 17,991.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,986.68 : 28,966.56 = 13,034.91 : x
  2. Step 2: Convert to fraction form
    20,986.68/28,966.56 = 13,034.91/x
  3. Step 3: Cross multiply
    20,986.68x = 28,966.56 × 13,034.91
  4. Step 4: Simplify right side
    20,986.68x = 377,576,502.61
  5. Step 5: Solve for x
    x = 377,576,502.61/20,986.68
  6. Step 6: Final answer
    x = 17,991.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.