Home / 15,728.96-21,705.57-8,558.57

Finding the Fourth Proportional to 15,728.96, 21,705.57 and 8,558.57

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Solution

The fourth proportional to 15,728.96, 21,705.57 and 8,558.57 is: 11,810.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,728.96 : 21,705.57 = 8,558.57 : x
  2. Step 2: Convert to fraction form
    15,728.96/21,705.57 = 8,558.57/x
  3. Step 3: Cross multiply
    15,728.96x = 21,705.57 × 8,558.57
  4. Step 4: Simplify right side
    15,728.96x = 185,768,694.50
  5. Step 5: Solve for x
    x = 185,768,694.50/15,728.96
  6. Step 6: Final answer
    x = 11,810.61

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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.