Home / 10,903.80-16,331.40-8,425.20

Finding the Fourth Proportional to 10,903.80, 16,331.40 and 8,425.20

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Solution

The fourth proportional to 10,903.80, 16,331.40 and 8,425.20 is: 12,619.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,903.80 : 16,331.40 = 8,425.20 : x
  2. Step 2: Convert to fraction form
    10,903.80/16,331.40 = 8,425.20/x
  3. Step 3: Cross multiply
    10,903.80x = 16,331.40 × 8,425.20
  4. Step 4: Simplify right side
    10,903.80x = 137,595,311.28
  5. Step 5: Solve for x
    x = 137,595,311.28/10,903.80
  6. Step 6: Final answer
    x = 12,619.02

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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.