Home / 12,191.90-18,288.53-3,426.13

Finding the Fourth Proportional to 12,191.90, 18,288.53 and 3,426.13

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Solution

The fourth proportional to 12,191.90, 18,288.53 and 3,426.13 is: 5,139.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,191.90 : 18,288.53 = 3,426.13 : x
  2. Step 2: Convert to fraction form
    12,191.90/18,288.53 = 3,426.13/x
  3. Step 3: Cross multiply
    12,191.90x = 18,288.53 × 3,426.13
  4. Step 4: Simplify right side
    12,191.90x = 62,658,881.29
  5. Step 5: Solve for x
    x = 62,658,881.29/12,191.90
  6. Step 6: Final answer
    x = 5,139.39

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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.