Home / 15,385.89-21,231.92-8,672.91

Finding the Fourth Proportional to 15,385.89, 21,231.92 and 8,672.91

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Solution

The fourth proportional to 15,385.89, 21,231.92 and 8,672.91 is: 11,968.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,385.89 : 21,231.92 = 8,672.91 : x
  2. Step 2: Convert to fraction form
    15,385.89/21,231.92 = 8,672.91/x
  3. Step 3: Cross multiply
    15,385.89x = 21,231.92 × 8,672.91
  4. Step 4: Simplify right side
    15,385.89x = 184,142,487.92
  5. Step 5: Solve for x
    x = 184,142,487.92/15,385.89
  6. Step 6: Final answer
    x = 11,968.27

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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.