Home / 8,434.80-12,652.20-7,122.60

Finding the Fourth Proportional to 8,434.80, 12,652.20 and 7,122.60

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Solution

The fourth proportional to 8,434.80, 12,652.20 and 7,122.60 is: 10,683.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,434.80 : 12,652.20 = 7,122.60 : x
  2. Step 2: Convert to fraction form
    8,434.80/12,652.20 = 7,122.60/x
  3. Step 3: Cross multiply
    8,434.80x = 12,652.20 × 7,122.60
  4. Step 4: Simplify right side
    8,434.80x = 90,116,559.72
  5. Step 5: Solve for x
    x = 90,116,559.72/8,434.80
  6. Step 6: Final answer
    x = 10,683.90

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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.