Home / 7,105.20-10,657.80-3,156.45

Finding the Fourth Proportional to 7,105.20, 10,657.80 and 3,156.45

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Solution

The fourth proportional to 7,105.20, 10,657.80 and 3,156.45 is: 4,734.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,105.20 : 10,657.80 = 3,156.45 : x
  2. Step 2: Convert to fraction form
    7,105.20/10,657.80 = 3,156.45/x
  3. Step 3: Cross multiply
    7,105.20x = 10,657.80 × 3,156.45
  4. Step 4: Simplify right side
    7,105.20x = 33,640,812.81
  5. Step 5: Solve for x
    x = 33,640,812.81/7,105.20
  6. Step 6: Final answer
    x = 4,734.68

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Similar ratio
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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.