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Finding the Fourth Proportional to 18,354.40, 27,458.70 and 15,916.30

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Solution

The fourth proportional to 18,354.40, 27,458.70 and 15,916.30 is: 23,811.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,354.40 : 27,458.70 = 15,916.30 : x
  2. Step 2: Convert to fraction form
    18,354.40/27,458.70 = 15,916.30/x
  3. Step 3: Cross multiply
    18,354.40x = 27,458.70 × 15,916.30
  4. Step 4: Simplify right side
    18,354.40x = 437,040,906.81
  5. Step 5: Solve for x
    x = 437,040,906.81/18,354.40
  6. Step 6: Final answer
    x = 23,811.23

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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.