Home / 15,081.34-20,811.75-9,111.96

Finding the Fourth Proportional to 15,081.34, 20,811.75 and 9,111.96

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Solution

The fourth proportional to 15,081.34, 20,811.75 and 9,111.96 is: 12,574.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,081.34 : 20,811.75 = 9,111.96 : x
  2. Step 2: Convert to fraction form
    15,081.34/20,811.75 = 9,111.96/x
  3. Step 3: Cross multiply
    15,081.34x = 20,811.75 × 9,111.96
  4. Step 4: Simplify right side
    15,081.34x = 189,635,833.53
  5. Step 5: Solve for x
    x = 189,635,833.53/15,081.34
  6. Step 6: Final answer
    x = 12,574.20

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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.