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Finding the Fourth Proportional to 17,612.70, 26,438.49 and 13,938.54

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Solution

The fourth proportional to 17,612.70, 26,438.49 and 13,938.54 is: 20,923.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,612.70 : 26,438.49 = 13,938.54 : x
  2. Step 2: Convert to fraction form
    17,612.70/26,438.49 = 13,938.54/x
  3. Step 3: Cross multiply
    17,612.70x = 26,438.49 × 13,938.54
  4. Step 4: Simplify right side
    17,612.70x = 368,513,950.40
  5. Step 5: Solve for x
    x = 368,513,950.40/17,612.70
  6. Step 6: Final answer
    x = 20,923.19

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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.