Home / 20,187.57-27,859.10-11,235.18

Finding the Fourth Proportional to 20,187.57, 27,859.10 and 11,235.18

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Solution

The fourth proportional to 20,187.57, 27,859.10 and 11,235.18 is: 15,504.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,187.57 : 27,859.10 = 11,235.18 : x
  2. Step 2: Convert to fraction form
    20,187.57/27,859.10 = 11,235.18/x
  3. Step 3: Cross multiply
    20,187.57x = 27,859.10 × 11,235.18
  4. Step 4: Simplify right side
    20,187.57x = 313,001,946.96
  5. Step 5: Solve for x
    x = 313,001,946.96/20,187.57
  6. Step 6: Final answer
    x = 15,504.69

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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.