Home / 21,115.19-31,722.06-18,162.74

Finding the Fourth Proportional to 21,115.19, 31,722.06 and 18,162.74

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Solution

The fourth proportional to 21,115.19, 31,722.06 and 18,162.74 is: 27,286.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,115.19 : 31,722.06 = 18,162.74 : x
  2. Step 2: Convert to fraction form
    21,115.19/31,722.06 = 18,162.74/x
  3. Step 3: Cross multiply
    21,115.19x = 31,722.06 × 18,162.74
  4. Step 4: Simplify right side
    21,115.19x = 576,159,528.04
  5. Step 5: Solve for x
    x = 576,159,528.04/21,115.19
  6. Step 6: Final answer
    x = 27,286.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.