Home / 10,191.20-15,266.96-9,090.40

Finding the Fourth Proportional to 10,191.20, 15,266.96 and 9,090.40

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Solution

The fourth proportional to 10,191.20, 15,266.96 and 9,090.40 is: 13,617.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,191.20 : 15,266.96 = 9,090.40 : x
  2. Step 2: Convert to fraction form
    10,191.20/15,266.96 = 9,090.40/x
  3. Step 3: Cross multiply
    10,191.20x = 15,266.96 × 9,090.40
  4. Step 4: Simplify right side
    10,191.20x = 138,782,773.18
  5. Step 5: Solve for x
    x = 138,782,773.18/10,191.20
  6. Step 6: Final answer
    x = 13,617.90

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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.