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Finding the Fourth Proportional to 18,897.96, 26,087.60 and 13,862.12

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Solution

The fourth proportional to 18,897.96, 26,087.60 and 13,862.12 is: 19,135.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,897.96 : 26,087.60 = 13,862.12 : x
  2. Step 2: Convert to fraction form
    18,897.96/26,087.60 = 13,862.12/x
  3. Step 3: Cross multiply
    18,897.96x = 26,087.60 × 13,862.12
  4. Step 4: Simplify right side
    18,897.96x = 361,629,441.71
  5. Step 5: Solve for x
    x = 361,629,441.71/18,897.96
  6. Step 6: Final answer
    x = 19,135.90

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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.