Home / 15,111.29-20,852.42-8,396.79

Finding the Fourth Proportional to 15,111.29, 20,852.42 and 8,396.79

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Solution

The fourth proportional to 15,111.29, 20,852.42 and 8,396.79 is: 11,586.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,111.29 : 20,852.42 = 8,396.79 : x
  2. Step 2: Convert to fraction form
    15,111.29/20,852.42 = 8,396.79/x
  3. Step 3: Cross multiply
    15,111.29x = 20,852.42 × 8,396.79
  4. Step 4: Simplify right side
    15,111.29x = 175,093,349.75
  5. Step 5: Solve for x
    x = 175,093,349.75/15,111.29
  6. Step 6: Final answer
    x = 11,586.93

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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.