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Finding the Fourth Proportional to 28,162, 38,863.56 and 15,588.64

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Solution

The fourth proportional to 28,162, 38,863.56 and 15,588.64 is: 21,512.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,162 : 38,863.56 = 15,588.64 : x
  2. Step 2: Convert to fraction form
    28,162/38,863.56 = 15,588.64/x
  3. Step 3: Cross multiply
    28,162x = 38,863.56 × 15,588.64
  4. Step 4: Simplify right side
    28,162x = 605,830,045.96
  5. Step 5: Solve for x
    x = 605,830,045.96/28,162
  6. Step 6: Final answer
    x = 21,512.32

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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.