Home / 10,376.80-15,540.90-6,440.20

Finding the Fourth Proportional to 10,376.80, 15,540.90 and 6,440.20

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Solution

The fourth proportional to 10,376.80, 15,540.90 and 6,440.20 is: 9,645.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,376.80 : 15,540.90 = 6,440.20 : x
  2. Step 2: Convert to fraction form
    10,376.80/15,540.90 = 6,440.20/x
  3. Step 3: Cross multiply
    10,376.80x = 15,540.90 × 6,440.20
  4. Step 4: Simplify right side
    10,376.80x = 100,086,504.18
  5. Step 5: Solve for x
    x = 100,086,504.18/10,376.80
  6. Step 6: Final answer
    x = 9,645.22

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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.