Home / 20,791.12-31,160.40-9,090.40

Finding the Fourth Proportional to 20,791.12, 31,160.40 and 9,090.40

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Solution

The fourth proportional to 20,791.12, 31,160.40 and 9,090.40 is: 13,624.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,791.12 : 31,160.40 = 9,090.40 : x
  2. Step 2: Convert to fraction form
    20,791.12/31,160.40 = 9,090.40/x
  3. Step 3: Cross multiply
    20,791.12x = 31,160.40 × 9,090.40
  4. Step 4: Simplify right side
    20,791.12x = 283,260,500.16
  5. Step 5: Solve for x
    x = 283,260,500.16/20,791.12
  6. Step 6: Final answer
    x = 13,624.11

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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.