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Finding the Fourth Proportional to 13,910.74, 20,742.02 and 12,365.26

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Solution

The fourth proportional to 13,910.74, 20,742.02 and 12,365.26 is: 18,437.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,910.74 : 20,742.02 = 12,365.26 : x
  2. Step 2: Convert to fraction form
    13,910.74/20,742.02 = 12,365.26/x
  3. Step 3: Cross multiply
    13,910.74x = 20,742.02 × 12,365.26
  4. Step 4: Simplify right side
    13,910.74x = 256,480,470.23
  5. Step 5: Solve for x
    x = 256,480,470.23/13,910.74
  6. Step 6: Final answer
    x = 18,437.59

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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.