Home / 8,909.40-13,367.20-3,978.56

Finding the Fourth Proportional to 8,909.40, 13,367.20 and 3,978.56

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Solution

The fourth proportional to 8,909.40, 13,367.20 and 3,978.56 is: 5,969.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,909.40 : 13,367.20 = 3,978.56 : x
  2. Step 2: Convert to fraction form
    8,909.40/13,367.20 = 3,978.56/x
  3. Step 3: Cross multiply
    8,909.40x = 13,367.20 × 3,978.56
  4. Step 4: Simplify right side
    8,909.40x = 53,182,207.23
  5. Step 5: Solve for x
    x = 53,182,207.23/8,909.40
  6. Step 6: Final answer
    x = 5,969.22

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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.