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Finding the Fourth Proportional to 22,240, 30,686.28 and 13,286.12

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Solution

The fourth proportional to 22,240, 30,686.28 and 13,286.12 is: 18,331.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,240 : 30,686.28 = 13,286.12 : x
  2. Step 2: Convert to fraction form
    22,240/30,686.28 = 13,286.12/x
  3. Step 3: Cross multiply
    22,240x = 30,686.28 × 13,286.12
  4. Step 4: Simplify right side
    22,240x = 407,701,598.43
  5. Step 5: Solve for x
    x = 407,701,598.43/22,240
  6. Step 6: Final answer
    x = 18,331.91

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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.