Home / 21,389.92-29,517.60-11,959.36

Finding the Fourth Proportional to 21,389.92, 29,517.60 and 11,959.36

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Solution

The fourth proportional to 21,389.92, 29,517.60 and 11,959.36 is: 16,503.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,389.92 : 29,517.60 = 11,959.36 : x
  2. Step 2: Convert to fraction form
    21,389.92/29,517.60 = 11,959.36/x
  3. Step 3: Cross multiply
    21,389.92x = 29,517.60 × 11,959.36
  4. Step 4: Simplify right side
    21,389.92x = 353,011,604.74
  5. Step 5: Solve for x
    x = 353,011,604.74/21,389.92
  6. Step 6: Final answer
    x = 16,503.64

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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.