Home / 21,653.75-29,882.18-13,270.25

Finding the Fourth Proportional to 21,653.75, 29,882.18 and 13,270.25

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Solution

The fourth proportional to 21,653.75, 29,882.18 and 13,270.25 is: 18,312.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,653.75 : 29,882.18 = 13,270.25 : x
  2. Step 2: Convert to fraction form
    21,653.75/29,882.18 = 13,270.25/x
  3. Step 3: Cross multiply
    21,653.75x = 29,882.18 × 13,270.25
  4. Step 4: Simplify right side
    21,653.75x = 396,543,999.15
  5. Step 5: Solve for x
    x = 396,543,999.15/21,653.75
  6. Step 6: Final answer
    x = 18,312.95

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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.