Home / 21,641.44-29,868.96-13,681.12

Finding the Fourth Proportional to 21,641.44, 29,868.96 and 13,681.12

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Solution

The fourth proportional to 21,641.44, 29,868.96 and 13,681.12 is: 18,882.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,641.44 : 29,868.96 = 13,681.12 : x
  2. Step 2: Convert to fraction form
    21,641.44/29,868.96 = 13,681.12/x
  3. Step 3: Cross multiply
    21,641.44x = 29,868.96 × 13,681.12
  4. Step 4: Simplify right side
    21,641.44x = 408,640,826.04
  5. Step 5: Solve for x
    x = 408,640,826.04/21,641.44
  6. Step 6: Final answer
    x = 18,882.33

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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.