Home / 20,156.38-27,823.55-13,439.55

Finding the Fourth Proportional to 20,156.38, 27,823.55 and 13,439.55

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Solution

The fourth proportional to 20,156.38, 27,823.55 and 13,439.55 is: 18,551.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,156.38 : 27,823.55 = 13,439.55 : x
  2. Step 2: Convert to fraction form
    20,156.38/27,823.55 = 13,439.55/x
  3. Step 3: Cross multiply
    20,156.38x = 27,823.55 × 13,439.55
  4. Step 4: Simplify right side
    20,156.38x = 373,935,991.40
  5. Step 5: Solve for x
    x = 373,935,991.40/20,156.38
  6. Step 6: Final answer
    x = 18,551.74

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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.