Home / 21,817.81-30,103.95-15,092.65

Finding the Fourth Proportional to 21,817.81, 30,103.95 and 15,092.65

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Solution

The fourth proportional to 21,817.81, 30,103.95 and 15,092.65 is: 20,824.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,817.81 : 30,103.95 = 15,092.65 : x
  2. Step 2: Convert to fraction form
    21,817.81/30,103.95 = 15,092.65/x
  3. Step 3: Cross multiply
    21,817.81x = 30,103.95 × 15,092.65
  4. Step 4: Simplify right side
    21,817.81x = 454,348,380.97
  5. Step 5: Solve for x
    x = 454,348,380.97/21,817.81
  6. Step 6: Final answer
    x = 20,824.66

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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.