Home / 21,716.57-29,972.09-13,759.54

Finding the Fourth Proportional to 21,716.57, 29,972.09 and 13,759.54

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Solution

The fourth proportional to 21,716.57, 29,972.09 and 13,759.54 is: 18,990.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,716.57 : 29,972.09 = 13,759.54 : x
  2. Step 2: Convert to fraction form
    21,716.57/29,972.09 = 13,759.54/x
  3. Step 3: Cross multiply
    21,716.57x = 29,972.09 × 13,759.54
  4. Step 4: Simplify right side
    21,716.57x = 412,402,130.71
  5. Step 5: Solve for x
    x = 412,402,130.71/21,716.57
  6. Step 6: Final answer
    x = 18,990.20

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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.