Home / 20,412.92-28,166.10-11,459.18

Finding the Fourth Proportional to 20,412.92, 28,166.10 and 11,459.18

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Solution

The fourth proportional to 20,412.92, 28,166.10 and 11,459.18 is: 15,811.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,412.92 : 28,166.10 = 11,459.18 : x
  2. Step 2: Convert to fraction form
    20,412.92/28,166.10 = 11,459.18/x
  3. Step 3: Cross multiply
    20,412.92x = 28,166.10 × 11,459.18
  4. Step 4: Simplify right side
    20,412.92x = 322,760,409.80
  5. Step 5: Solve for x
    x = 322,760,409.80/20,412.92
  6. Step 6: Final answer
    x = 15,811.57

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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.