Home / 21,232.20-29,286.18-13,688.14

Finding the Fourth Proportional to 21,232.20, 29,286.18 and 13,688.14

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Solution

The fourth proportional to 21,232.20, 29,286.18 and 13,688.14 is: 18,880.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,232.20 : 29,286.18 = 13,688.14 : x
  2. Step 2: Convert to fraction form
    21,232.20/29,286.18 = 13,688.14/x
  3. Step 3: Cross multiply
    21,232.20x = 29,286.18 × 13,688.14
  4. Step 4: Simplify right side
    21,232.20x = 400,873,331.91
  5. Step 5: Solve for x
    x = 400,873,331.91/21,232.20
  6. Step 6: Final answer
    x = 18,880.44

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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.