Home / 10,371.20-15,540.60-8,718.80

Finding the Fourth Proportional to 10,371.20, 15,540.60 and 8,718.80

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Solution

The fourth proportional to 10,371.20, 15,540.60 and 8,718.80 is: 13,064.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,371.20 : 15,540.60 = 8,718.80 : x
  2. Step 2: Convert to fraction form
    10,371.20/15,540.60 = 8,718.80/x
  3. Step 3: Cross multiply
    10,371.20x = 15,540.60 × 8,718.80
  4. Step 4: Simplify right side
    10,371.20x = 135,495,383.28
  5. Step 5: Solve for x
    x = 135,495,383.28/10,371.20
  6. Step 6: Final answer
    x = 13,064.58

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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.