Home / 21,402.25-29,535.22-11,970.81

Finding the Fourth Proportional to 21,402.25, 29,535.22 and 11,970.81

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Solution

The fourth proportional to 21,402.25, 29,535.22 and 11,970.81 is: 16,519.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,402.25 : 29,535.22 = 11,970.81 : x
  2. Step 2: Convert to fraction form
    21,402.25/29,535.22 = 11,970.81/x
  3. Step 3: Cross multiply
    21,402.25x = 29,535.22 × 11,970.81
  4. Step 4: Simplify right side
    21,402.25x = 353,560,506.93
  5. Step 5: Solve for x
    x = 353,560,506.93/21,402.25
  6. Step 6: Final answer
    x = 16,519.78

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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.