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Finding the Fourth Proportional to 17,372.80, 26,020.80 and 13,446.40

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Solution

The fourth proportional to 17,372.80, 26,020.80 and 13,446.40 is: 20,139.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,372.80 : 26,020.80 = 13,446.40 : x
  2. Step 2: Convert to fraction form
    17,372.80/26,020.80 = 13,446.40/x
  3. Step 3: Cross multiply
    17,372.80x = 26,020.80 × 13,446.40
  4. Step 4: Simplify right side
    17,372.80x = 349,886,085.12
  5. Step 5: Solve for x
    x = 349,886,085.12/17,372.80
  6. Step 6: Final answer
    x = 20,139.88

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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.