Home / 12,540.28-18,811.08-6,620.80

Finding the Fourth Proportional to 12,540.28, 18,811.08 and 6,620.80

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Solution

The fourth proportional to 12,540.28, 18,811.08 and 6,620.80 is: 9,931.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,540.28 : 18,811.08 = 6,620.80 : x
  2. Step 2: Convert to fraction form
    12,540.28/18,811.08 = 6,620.80/x
  3. Step 3: Cross multiply
    12,540.28x = 18,811.08 × 6,620.80
  4. Step 4: Simplify right side
    12,540.28x = 124,544,398.46
  5. Step 5: Solve for x
    x = 124,544,398.46/12,540.28
  6. Step 6: Final answer
    x = 9,931.55

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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.