Home / 21,738.80-30,001.40-12,309.04

Finding the Fourth Proportional to 21,738.80, 30,001.40 and 12,309.04

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Solution

The fourth proportional to 21,738.80, 30,001.40 and 12,309.04 is: 16,987.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,738.80 : 30,001.40 = 12,309.04 : x
  2. Step 2: Convert to fraction form
    21,738.80/30,001.40 = 12,309.04/x
  3. Step 3: Cross multiply
    21,738.80x = 30,001.40 × 12,309.04
  4. Step 4: Simplify right side
    21,738.80x = 369,288,432.66
  5. Step 5: Solve for x
    x = 369,288,432.66/21,738.80
  6. Step 6: Final answer
    x = 16,987.53

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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.