Home / 12,191.55-18,287.31-4,292.21

Finding the Fourth Proportional to 12,191.55, 18,287.31 and 4,292.21

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Solution

The fourth proportional to 12,191.55, 18,287.31 and 4,292.21 is: 6,438.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,191.55 : 18,287.31 = 4,292.21 : x
  2. Step 2: Convert to fraction form
    12,191.55/18,287.31 = 4,292.21/x
  3. Step 3: Cross multiply
    12,191.55x = 18,287.31 × 4,292.21
  4. Step 4: Simplify right side
    12,191.55x = 78,492,883.42
  5. Step 5: Solve for x
    x = 78,492,883.42/12,191.55
  6. Step 6: Final answer
    x = 6,438.30

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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.