Home / 21,178.93-31,705.98-18,551.57

Finding the Fourth Proportional to 21,178.93, 31,705.98 and 18,551.57

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Solution

The fourth proportional to 21,178.93, 31,705.98 and 18,551.57 is: 27,772.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,178.93 : 31,705.98 = 18,551.57 : x
  2. Step 2: Convert to fraction form
    21,178.93/31,705.98 = 18,551.57/x
  3. Step 3: Cross multiply
    21,178.93x = 31,705.98 × 18,551.57
  4. Step 4: Simplify right side
    21,178.93x = 588,195,786.65
  5. Step 5: Solve for x
    x = 588,195,786.65/21,178.93
  6. Step 6: Final answer
    x = 27,772.69

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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.