Home / 21,397.20-29,529.57-11,965.75

Finding the Fourth Proportional to 21,397.20, 29,529.57 and 11,965.75

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Solution

The fourth proportional to 21,397.20, 29,529.57 and 11,965.75 is: 16,513.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,397.20 : 29,529.57 = 11,965.75 : x
  2. Step 2: Convert to fraction form
    21,397.20/29,529.57 = 11,965.75/x
  3. Step 3: Cross multiply
    21,397.20x = 29,529.57 × 11,965.75
  4. Step 4: Simplify right side
    21,397.20x = 353,343,452.23
  5. Step 5: Solve for x
    x = 353,343,452.23/21,397.20
  6. Step 6: Final answer
    x = 16,513.54

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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.