Home / 12,371.20-18,567.60-9,908.80

Finding the Fourth Proportional to 12,371.20, 18,567.60 and 9,908.80

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Solution

The fourth proportional to 12,371.20, 18,567.60 and 9,908.80 is: 14,871.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,371.20 : 18,567.60 = 9,908.80 : x
  2. Step 2: Convert to fraction form
    12,371.20/18,567.60 = 9,908.80/x
  3. Step 3: Cross multiply
    12,371.20x = 18,567.60 × 9,908.80
  4. Step 4: Simplify right side
    12,371.20x = 183,982,634.88
  5. Step 5: Solve for x
    x = 183,982,634.88/12,371.20
  6. Step 6: Final answer
    x = 14,871.85

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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.