Home / 21,540.91-29,718.02-15,889.11

Finding the Fourth Proportional to 21,540.91, 29,718.02 and 15,889.11

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Solution

The fourth proportional to 21,540.91, 29,718.02 and 15,889.11 is: 21,920.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,540.91 : 29,718.02 = 15,889.11 : x
  2. Step 2: Convert to fraction form
    21,540.91/29,718.02 = 15,889.11/x
  3. Step 3: Cross multiply
    21,540.91x = 29,718.02 × 15,889.11
  4. Step 4: Simplify right side
    21,540.91x = 472,192,888.76
  5. Step 5: Solve for x
    x = 472,192,888.76/21,540.91
  6. Step 6: Final answer
    x = 21,920.75

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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.