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Finding the Fourth Proportional to 13,601.70, 20,402.55 and 11,009.70

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Solution

The fourth proportional to 13,601.70, 20,402.55 and 11,009.70 is: 16,514.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,601.70 : 20,402.55 = 11,009.70 : x
  2. Step 2: Convert to fraction form
    13,601.70/20,402.55 = 11,009.70/x
  3. Step 3: Cross multiply
    13,601.70x = 20,402.55 × 11,009.70
  4. Step 4: Simplify right side
    13,601.70x = 224,625,954.74
  5. Step 5: Solve for x
    x = 224,625,954.74/13,601.70
  6. Step 6: Final answer
    x = 16,514.55

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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.