Home / 21,894.72-30,215.45-12,949.89

Finding the Fourth Proportional to 21,894.72, 30,215.45 and 12,949.89

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Solution

The fourth proportional to 21,894.72, 30,215.45 and 12,949.89 is: 17,871.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,894.72 : 30,215.45 = 12,949.89 : x
  2. Step 2: Convert to fraction form
    21,894.72/30,215.45 = 12,949.89/x
  3. Step 3: Cross multiply
    21,894.72x = 30,215.45 × 12,949.89
  4. Step 4: Simplify right side
    21,894.72x = 391,286,753.80
  5. Step 5: Solve for x
    x = 391,286,753.80/21,894.72
  6. Step 6: Final answer
    x = 17,871.28

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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.