Home / 21,816.66-30,103.38-12,862.96

Finding the Fourth Proportional to 21,816.66, 30,103.38 and 12,862.96

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Solution

The fourth proportional to 21,816.66, 30,103.38 and 12,862.96 is: 17,748.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,816.66 : 30,103.38 = 12,862.96 : x
  2. Step 2: Convert to fraction form
    21,816.66/30,103.38 = 12,862.96/x
  3. Step 3: Cross multiply
    21,816.66x = 30,103.38 × 12,862.96
  4. Step 4: Simplify right side
    21,816.66x = 387,218,572.80
  5. Step 5: Solve for x
    x = 387,218,572.80/21,816.66
  6. Step 6: Final answer
    x = 17,748.76

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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.