Home / 12,112.60-18,169.80-4,320.40

Finding the Fourth Proportional to 12,112.60, 18,169.80 and 4,320.40

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Solution

The fourth proportional to 12,112.60, 18,169.80 and 4,320.40 is: 6,480.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,112.60 : 18,169.80 = 4,320.40 : x
  2. Step 2: Convert to fraction form
    12,112.60/18,169.80 = 4,320.40/x
  3. Step 3: Cross multiply
    12,112.60x = 18,169.80 × 4,320.40
  4. Step 4: Simplify right side
    12,112.60x = 78,500,803.92
  5. Step 5: Solve for x
    x = 78,500,803.92/12,112.60
  6. Step 6: Final answer
    x = 6,480.92

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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.