Home / 8,889.20-13,317.60-5,422.40

Finding the Fourth Proportional to 8,889.20, 13,317.60 and 5,422.40

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Solution

The fourth proportional to 8,889.20, 13,317.60 and 5,422.40 is: 8,123.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,889.20 : 13,317.60 = 5,422.40 : x
  2. Step 2: Convert to fraction form
    8,889.20/13,317.60 = 5,422.40/x
  3. Step 3: Cross multiply
    8,889.20x = 13,317.60 × 5,422.40
  4. Step 4: Simplify right side
    8,889.20x = 72,213,354.24
  5. Step 5: Solve for x
    x = 72,213,354.24/8,889.20
  6. Step 6: Final answer
    x = 8,123.72

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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.