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Finding the Fourth Proportional to 21,867.88, 32,806.59 and 7,078.29

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Solution

The fourth proportional to 21,867.88, 32,806.59 and 7,078.29 is: 10,618.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,867.88 : 32,806.59 = 7,078.29 : x
  2. Step 2: Convert to fraction form
    21,867.88/32,806.59 = 7,078.29/x
  3. Step 3: Cross multiply
    21,867.88x = 32,806.59 × 7,078.29
  4. Step 4: Simplify right side
    21,867.88x = 232,214,557.93
  5. Step 5: Solve for x
    x = 232,214,557.93/21,867.88
  6. Step 6: Final answer
    x = 10,618.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.