Home / 21,902.32-30,217.08-15,193.90

Finding the Fourth Proportional to 21,902.32, 30,217.08 and 15,193.90

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Solution

The fourth proportional to 21,902.32, 30,217.08 and 15,193.90 is: 20,961.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,902.32 : 30,217.08 = 15,193.90 : x
  2. Step 2: Convert to fraction form
    21,902.32/30,217.08 = 15,193.90/x
  3. Step 3: Cross multiply
    21,902.32x = 30,217.08 × 15,193.90
  4. Step 4: Simplify right side
    21,902.32x = 459,115,291.81
  5. Step 5: Solve for x
    x = 459,115,291.81/21,902.32
  6. Step 6: Final answer
    x = 20,961.95

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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.