Home / 21,534.57-29,705.31-13,454.21

Finding the Fourth Proportional to 21,534.57, 29,705.31 and 13,454.21

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Solution

The fourth proportional to 21,534.57, 29,705.31 and 13,454.21 is: 18,559.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,534.57 : 29,705.31 = 13,454.21 : x
  2. Step 2: Convert to fraction form
    21,534.57/29,705.31 = 13,454.21/x
  3. Step 3: Cross multiply
    21,534.57x = 29,705.31 × 13,454.21
  4. Step 4: Simplify right side
    21,534.57x = 399,661,330.33
  5. Step 5: Solve for x
    x = 399,661,330.33/21,534.57
  6. Step 6: Final answer
    x = 18,559.06

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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.