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Finding the Fourth Proportional to 40,348.40, 60,530.70 and 12,270.20

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Solution

The fourth proportional to 40,348.40, 60,530.70 and 12,270.20 is: 18,407.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,348.40 : 60,530.70 = 12,270.20 : x
  2. Step 2: Convert to fraction form
    40,348.40/60,530.70 = 12,270.20/x
  3. Step 3: Cross multiply
    40,348.40x = 60,530.70 × 12,270.20
  4. Step 4: Simplify right side
    40,348.40x = 742,723,795.14
  5. Step 5: Solve for x
    x = 742,723,795.14/40,348.40
  6. Step 6: Final answer
    x = 18,407.76

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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.