Home / 22,215.36-30,615-15,916.80

Finding the Fourth Proportional to 22,215.36, 30,615 and 15,916.80

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Solution

The fourth proportional to 22,215.36, 30,615 and 15,916.80 is: 21,934.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,215.36 : 30,615 = 15,916.80 : x
  2. Step 2: Convert to fraction form
    22,215.36/30,615 = 15,916.80/x
  3. Step 3: Cross multiply
    22,215.36x = 30,615 × 15,916.80
  4. Step 4: Simplify right side
    22,215.36x = 487,292,832
  5. Step 5: Solve for x
    x = 487,292,832/22,215.36
  6. Step 6: Final answer
    x = 21,934.95

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Double scale
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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.