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Finding the Fourth Proportional to 18,873.13, 26,058.45 and 13,220.42

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Solution

The fourth proportional to 18,873.13, 26,058.45 and 13,220.42 is: 18,253.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,873.13 : 26,058.45 = 13,220.42 : x
  2. Step 2: Convert to fraction form
    18,873.13/26,058.45 = 13,220.42/x
  3. Step 3: Cross multiply
    18,873.13x = 26,058.45 × 13,220.42
  4. Step 4: Simplify right side
    18,873.13x = 344,503,479.88
  5. Step 5: Solve for x
    x = 344,503,479.88/18,873.13
  6. Step 6: Final answer
    x = 18,253.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.