Home / 7,421.60-11,114.40-3,951.20

Finding the Fourth Proportional to 7,421.60, 11,114.40 and 3,951.20

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Solution

The fourth proportional to 7,421.60, 11,114.40 and 3,951.20 is: 5,917.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,421.60 : 11,114.40 = 3,951.20 : x
  2. Step 2: Convert to fraction form
    7,421.60/11,114.40 = 3,951.20/x
  3. Step 3: Cross multiply
    7,421.60x = 11,114.40 × 3,951.20
  4. Step 4: Simplify right side
    7,421.60x = 43,915,217.28
  5. Step 5: Solve for x
    x = 43,915,217.28/7,421.60
  6. Step 6: Final answer
    x = 5,917.22

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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.