Home / 8,540.90-12,819.45-7,309.70

Finding the Fourth Proportional to 8,540.90, 12,819.45 and 7,309.70

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Solution

The fourth proportional to 8,540.90, 12,819.45 and 7,309.70 is: 10,971.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,540.90 : 12,819.45 = 7,309.70 : x
  2. Step 2: Convert to fraction form
    8,540.90/12,819.45 = 7,309.70/x
  3. Step 3: Cross multiply
    8,540.90x = 12,819.45 × 7,309.70
  4. Step 4: Simplify right side
    8,540.90x = 93,706,333.67
  5. Step 5: Solve for x
    x = 93,706,333.67/8,540.90
  6. Step 6: Final answer
    x = 10,971.48

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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.