Home / 12,356.70-18,549.45-7,431.90

Finding the Fourth Proportional to 12,356.70, 18,549.45 and 7,431.90

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Solution

The fourth proportional to 12,356.70, 18,549.45 and 7,431.90 is: 11,156.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,356.70 : 18,549.45 = 7,431.90 : x
  2. Step 2: Convert to fraction form
    12,356.70/18,549.45 = 7,431.90/x
  3. Step 3: Cross multiply
    12,356.70x = 18,549.45 × 7,431.90
  4. Step 4: Simplify right side
    12,356.70x = 137,857,657.46
  5. Step 5: Solve for x
    x = 137,857,657.46/12,356.70
  6. Step 6: Final answer
    x = 11,156.51

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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.