Home / 21,902.73-30,214.38-13,931.13

Finding the Fourth Proportional to 21,902.73, 30,214.38 and 13,931.13

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Solution

The fourth proportional to 21,902.73, 30,214.38 and 13,931.13 is: 19,217.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,902.73 : 30,214.38 = 13,931.13 : x
  2. Step 2: Convert to fraction form
    21,902.73/30,214.38 = 13,931.13/x
  3. Step 3: Cross multiply
    21,902.73x = 30,214.38 × 13,931.13
  4. Step 4: Simplify right side
    21,902.73x = 420,920,455.65
  5. Step 5: Solve for x
    x = 420,920,455.65/21,902.73
  6. Step 6: Final answer
    x = 19,217.72

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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.