Home / 20,817.10-31,197.93-7,657.30

Finding the Fourth Proportional to 20,817.10, 31,197.93 and 7,657.30

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Solution

The fourth proportional to 20,817.10, 31,197.93 and 7,657.30 is: 11,475.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,817.10 : 31,197.93 = 7,657.30 : x
  2. Step 2: Convert to fraction form
    20,817.10/31,197.93 = 7,657.30/x
  3. Step 3: Cross multiply
    20,817.10x = 31,197.93 × 7,657.30
  4. Step 4: Simplify right side
    20,817.10x = 238,891,909.39
  5. Step 5: Solve for x
    x = 238,891,909.39/20,817.10
  6. Step 6: Final answer
    x = 11,475.75

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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.