Home / 11,754.40-16,220.80-6,721.60

Finding the Fourth Proportional to 11,754.40, 16,220.80 and 6,721.60

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Solution

The fourth proportional to 11,754.40, 16,220.80 and 6,721.60 is: 9,275.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,754.40 : 16,220.80 = 6,721.60 : x
  2. Step 2: Convert to fraction form
    11,754.40/16,220.80 = 6,721.60/x
  3. Step 3: Cross multiply
    11,754.40x = 16,220.80 × 6,721.60
  4. Step 4: Simplify right side
    11,754.40x = 109,029,729.28
  5. Step 5: Solve for x
    x = 109,029,729.28/11,754.40
  6. Step 6: Final answer
    x = 9,275.65

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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.