Home / 21,965.11-30,289.19-18,788.92

Finding the Fourth Proportional to 21,965.11, 30,289.19 and 18,788.92

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Solution

The fourth proportional to 21,965.11, 30,289.19 and 18,788.92 is: 25,909.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,965.11 : 30,289.19 = 18,788.92 : x
  2. Step 2: Convert to fraction form
    21,965.11/30,289.19 = 18,788.92/x
  3. Step 3: Cross multiply
    21,965.11x = 30,289.19 × 18,788.92
  4. Step 4: Simplify right side
    21,965.11x = 569,101,139.02
  5. Step 5: Solve for x
    x = 569,101,139.02/21,965.11
  6. Step 6: Final answer
    x = 25,909.33

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Double scale
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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.