Home / 21,147.49-29,182.38-11,585.61

Finding the Fourth Proportional to 21,147.49, 29,182.38 and 11,585.61

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Solution

The fourth proportional to 21,147.49, 29,182.38 and 11,585.61 is: 15,987.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,147.49 : 29,182.38 = 11,585.61 : x
  2. Step 2: Convert to fraction form
    21,147.49/29,182.38 = 11,585.61/x
  3. Step 3: Cross multiply
    21,147.49x = 29,182.38 × 11,585.61
  4. Step 4: Simplify right side
    21,147.49x = 338,095,673.55
  5. Step 5: Solve for x
    x = 338,095,673.55/21,147.49
  6. Step 6: Final answer
    x = 15,987.51

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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.