Home / 12,631.40-18,947.10-4,320.80

Finding the Fourth Proportional to 12,631.40, 18,947.10 and 4,320.80

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Solution

The fourth proportional to 12,631.40, 18,947.10 and 4,320.80 is: 6,481.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,631.40 : 18,947.10 = 4,320.80 : x
  2. Step 2: Convert to fraction form
    12,631.40/18,947.10 = 4,320.80/x
  3. Step 3: Cross multiply
    12,631.40x = 18,947.10 × 4,320.80
  4. Step 4: Simplify right side
    12,631.40x = 81,866,629.68
  5. Step 5: Solve for x
    x = 81,866,629.68/12,631.40
  6. Step 6: Final answer
    x = 6,481.20

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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.