Home / 21,319.91-29,421.07-11,760.69

Finding the Fourth Proportional to 21,319.91, 29,421.07 and 11,760.69

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Solution

The fourth proportional to 21,319.91, 29,421.07 and 11,760.69 is: 16,229.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,319.91 : 29,421.07 = 11,760.69 : x
  2. Step 2: Convert to fraction form
    21,319.91/29,421.07 = 11,760.69/x
  3. Step 3: Cross multiply
    21,319.91x = 29,421.07 × 11,760.69
  4. Step 4: Simplify right side
    21,319.91x = 346,012,083.74
  5. Step 5: Solve for x
    x = 346,012,083.74/21,319.91
  6. Step 6: Final answer
    x = 16,229.53

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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.