Home / 15,899.06-21,939.92-8,728.80

Finding the Fourth Proportional to 15,899.06, 21,939.92 and 8,728.80

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Solution

The fourth proportional to 15,899.06, 21,939.92 and 8,728.80 is: 12,045.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,899.06 : 21,939.92 = 8,728.80 : x
  2. Step 2: Convert to fraction form
    15,899.06/21,939.92 = 8,728.80/x
  3. Step 3: Cross multiply
    15,899.06x = 21,939.92 × 8,728.80
  4. Step 4: Simplify right side
    15,899.06x = 191,509,173.70
  5. Step 5: Solve for x
    x = 191,509,173.70/15,899.06
  6. Step 6: Final answer
    x = 12,045.31

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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.