Home / 20,700.26-31,050.40-5,117.90

Finding the Fourth Proportional to 20,700.26, 31,050.40 and 5,117.90

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Solution

The fourth proportional to 20,700.26, 31,050.40 and 5,117.90 is: 7,676.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,700.26 : 31,050.40 = 5,117.90 : x
  2. Step 2: Convert to fraction form
    20,700.26/31,050.40 = 5,117.90/x
  3. Step 3: Cross multiply
    20,700.26x = 31,050.40 × 5,117.90
  4. Step 4: Simplify right side
    20,700.26x = 158,912,842.16
  5. Step 5: Solve for x
    x = 158,912,842.16/20,700.26
  6. Step 6: Final answer
    x = 7,676.85

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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.