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Finding the Fourth Proportional to 7,270.60, 10,905.90 and 5,312.20

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Solution

The fourth proportional to 7,270.60, 10,905.90 and 5,312.20 is: 7,968.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,270.60 : 10,905.90 = 5,312.20 : x
  2. Step 2: Convert to fraction form
    7,270.60/10,905.90 = 5,312.20/x
  3. Step 3: Cross multiply
    7,270.60x = 10,905.90 × 5,312.20
  4. Step 4: Simplify right side
    7,270.60x = 57,934,321.98
  5. Step 5: Solve for x
    x = 57,934,321.98/7,270.60
  6. Step 6: Final answer
    x = 7,968.30

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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.