Home / 21,510.75-29,671.97-13,539.14

Finding the Fourth Proportional to 21,510.75, 29,671.97 and 13,539.14

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Solution

The fourth proportional to 21,510.75, 29,671.97 and 13,539.14 is: 18,675.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,510.75 : 29,671.97 = 13,539.14 : x
  2. Step 2: Convert to fraction form
    21,510.75/29,671.97 = 13,539.14/x
  3. Step 3: Cross multiply
    21,510.75x = 29,671.97 × 13,539.14
  4. Step 4: Simplify right side
    21,510.75x = 401,732,739.85
  5. Step 5: Solve for x
    x = 401,732,739.85/21,510.75
  6. Step 6: Final answer
    x = 18,675.91

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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.