Home / 20,717.55-31,076.30-5,135.18

Finding the Fourth Proportional to 20,717.55, 31,076.30 and 5,135.18

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Solution

The fourth proportional to 20,717.55, 31,076.30 and 5,135.18 is: 7,702.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,717.55 : 31,076.30 = 5,135.18 : x
  2. Step 2: Convert to fraction form
    20,717.55/31,076.30 = 5,135.18/x
  3. Step 3: Cross multiply
    20,717.55x = 31,076.30 × 5,135.18
  4. Step 4: Simplify right side
    20,717.55x = 159,582,238.85
  5. Step 5: Solve for x
    x = 159,582,238.85/20,717.55
  6. Step 6: Final answer
    x = 7,702.76

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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.