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Finding the Fourth Proportional to 18,863.68, 26,032.44 and 10,905.20

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Solution

The fourth proportional to 18,863.68, 26,032.44 and 10,905.20 is: 15,049.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,863.68 : 26,032.44 = 10,905.20 : x
  2. Step 2: Convert to fraction form
    18,863.68/26,032.44 = 10,905.20/x
  3. Step 3: Cross multiply
    18,863.68x = 26,032.44 × 10,905.20
  4. Step 4: Simplify right side
    18,863.68x = 283,888,964.69
  5. Step 5: Solve for x
    x = 283,888,964.69/18,863.68
  6. Step 6: Final answer
    x = 15,049.50

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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.