Home / 15,728.80-21,705.60-8,558.56

Finding the Fourth Proportional to 15,728.80, 21,705.60 and 8,558.56

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Solution

The fourth proportional to 15,728.80, 21,705.60 and 8,558.56 is: 11,810.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,728.80 : 21,705.60 = 8,558.56 : x
  2. Step 2: Convert to fraction form
    15,728.80/21,705.60 = 8,558.56/x
  3. Step 3: Cross multiply
    15,728.80x = 21,705.60 × 8,558.56
  4. Step 4: Simplify right side
    15,728.80x = 185,768,679.94
  5. Step 5: Solve for x
    x = 185,768,679.94/15,728.80
  6. Step 6: Final answer
    x = 11,810.73

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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.