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Finding the Fourth Proportional to 12,248.40, 18,289.41 and 11,916.24

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Solution

The fourth proportional to 12,248.40, 18,289.41 and 11,916.24 is: 17,793.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,248.40 : 18,289.41 = 11,916.24 : x
  2. Step 2: Convert to fraction form
    12,248.40/18,289.41 = 11,916.24/x
  3. Step 3: Cross multiply
    12,248.40x = 18,289.41 × 11,916.24
  4. Step 4: Simplify right side
    12,248.40x = 217,940,999.02
  5. Step 5: Solve for x
    x = 217,940,999.02/12,248.40
  6. Step 6: Final answer
    x = 17,793.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.