Home / 28,240.66-38,972.13-15,665.41

Finding the Fourth Proportional to 28,240.66, 38,972.13 and 15,665.41

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Solution

The fourth proportional to 28,240.66, 38,972.13 and 15,665.41 is: 21,618.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,240.66 : 38,972.13 = 15,665.41 : x
  2. Step 2: Convert to fraction form
    28,240.66/38,972.13 = 15,665.41/x
  3. Step 3: Cross multiply
    28,240.66x = 38,972.13 × 15,665.41
  4. Step 4: Simplify right side
    28,240.66x = 610,514,297.59
  5. Step 5: Solve for x
    x = 610,514,297.59/28,240.66
  6. Step 6: Final answer
    x = 21,618.27

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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.