Home / 21,724.20-29,981.34-12,767.22

Finding the Fourth Proportional to 21,724.20, 29,981.34 and 12,767.22

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Solution

The fourth proportional to 21,724.20, 29,981.34 and 12,767.22 is: 17,619.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,724.20 : 29,981.34 = 12,767.22 : x
  2. Step 2: Convert to fraction form
    21,724.20/29,981.34 = 12,767.22/x
  3. Step 3: Cross multiply
    21,724.20x = 29,981.34 × 12,767.22
  4. Step 4: Simplify right side
    21,724.20x = 382,778,363.67
  5. Step 5: Solve for x
    x = 382,778,363.67/21,724.20
  6. Step 6: Final answer
    x = 17,619.91

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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.