Home / 21,780.88-30,052.98-12,825.11

Finding the Fourth Proportional to 21,780.88, 30,052.98 and 12,825.11

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Solution

The fourth proportional to 21,780.88, 30,052.98 and 12,825.11 is: 17,695.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,780.88 : 30,052.98 = 12,825.11 : x
  2. Step 2: Convert to fraction form
    21,780.88/30,052.98 = 12,825.11/x
  3. Step 3: Cross multiply
    21,780.88x = 30,052.98 × 12,825.11
  4. Step 4: Simplify right side
    21,780.88x = 385,432,774.33
  5. Step 5: Solve for x
    x = 385,432,774.33/21,780.88
  6. Step 6: Final answer
    x = 17,695.93

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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.