Home / 20,787.88-31,126.44-18,130.68

Finding the Fourth Proportional to 20,787.88, 31,126.44 and 18,130.68

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Solution

The fourth proportional to 20,787.88, 31,126.44 and 18,130.68 is: 27,147.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,787.88 : 31,126.44 = 18,130.68 : x
  2. Step 2: Convert to fraction form
    20,787.88/31,126.44 = 18,130.68/x
  3. Step 3: Cross multiply
    20,787.88x = 31,126.44 × 18,130.68
  4. Step 4: Simplify right side
    20,787.88x = 564,343,523.18
  5. Step 5: Solve for x
    x = 564,343,523.18/20,787.88
  6. Step 6: Final answer
    x = 27,147.72

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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.