Home / 21,724.97-29,970.41-15,019.92

Finding the Fourth Proportional to 21,724.97, 29,970.41 and 15,019.92

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Solution

The fourth proportional to 21,724.97, 29,970.41 and 15,019.92 is: 20,720.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,724.97 : 29,970.41 = 15,019.92 : x
  2. Step 2: Convert to fraction form
    21,724.97/29,970.41 = 15,019.92/x
  3. Step 3: Cross multiply
    21,724.97x = 29,970.41 × 15,019.92
  4. Step 4: Simplify right side
    21,724.97x = 450,153,085.47
  5. Step 5: Solve for x
    x = 450,153,085.47/21,724.97
  6. Step 6: Final answer
    x = 20,720.54

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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.