Home / 20,115.81-27,763.14-11,166.18

Finding the Fourth Proportional to 20,115.81, 27,763.14 and 11,166.18

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Solution

The fourth proportional to 20,115.81, 27,763.14 and 11,166.18 is: 15,411.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,115.81 : 27,763.14 = 11,166.18 : x
  2. Step 2: Convert to fraction form
    20,115.81/27,763.14 = 11,166.18/x
  3. Step 3: Cross multiply
    20,115.81x = 27,763.14 × 11,166.18
  4. Step 4: Simplify right side
    20,115.81x = 310,008,218.61
  5. Step 5: Solve for x
    x = 310,008,218.61/20,115.81
  6. Step 6: Final answer
    x = 15,411.17

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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.