Home / 12,191.79-18,287.69-4,292.45

Finding the Fourth Proportional to 12,191.79, 18,287.69 and 4,292.45

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Solution

The fourth proportional to 12,191.79, 18,287.69 and 4,292.45 is: 6,438.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,191.79 : 18,287.69 = 4,292.45 : x
  2. Step 2: Convert to fraction form
    12,191.79/18,287.69 = 4,292.45/x
  3. Step 3: Cross multiply
    12,191.79x = 18,287.69 × 4,292.45
  4. Step 4: Simplify right side
    12,191.79x = 78,498,994.94
  5. Step 5: Solve for x
    x = 78,498,994.94/12,191.79
  6. Step 6: Final answer
    x = 6,438.68

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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.