Home / 21,824.40-30,116.34-12,872.28

Finding the Fourth Proportional to 21,824.40, 30,116.34 and 12,872.28

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Solution

The fourth proportional to 21,824.40, 30,116.34 and 12,872.28 is: 17,762.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,824.40 : 30,116.34 = 12,872.28 : x
  2. Step 2: Convert to fraction form
    21,824.40/30,116.34 = 12,872.28/x
  3. Step 3: Cross multiply
    21,824.40x = 30,116.34 × 12,872.28
  4. Step 4: Simplify right side
    21,824.40x = 387,665,961.06
  5. Step 5: Solve for x
    x = 387,665,961.06/21,824.40
  6. Step 6: Final answer
    x = 17,762.96

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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.