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Finding the Fourth Proportional to 7,158.60, 10,738.70 and 2,228.20

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Solution

The fourth proportional to 7,158.60, 10,738.70 and 2,228.20 is: 3,342.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,158.60 : 10,738.70 = 2,228.20 : x
  2. Step 2: Convert to fraction form
    7,158.60/10,738.70 = 2,228.20/x
  3. Step 3: Cross multiply
    7,158.60x = 10,738.70 × 2,228.20
  4. Step 4: Simplify right side
    7,158.60x = 23,927,971.34
  5. Step 5: Solve for x
    x = 23,927,971.34/7,158.60
  6. Step 6: Final answer
    x = 3,342.55

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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.