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Finding the Fourth Proportional to 21,930.40, 32,886.96 and 7,886.56

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Solution

The fourth proportional to 21,930.40, 32,886.96 and 7,886.56 is: 11,826.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,930.40 : 32,886.96 = 7,886.56 : x
  2. Step 2: Convert to fraction form
    21,930.40/32,886.96 = 7,886.56/x
  3. Step 3: Cross multiply
    21,930.40x = 32,886.96 × 7,886.56
  4. Step 4: Simplify right side
    21,930.40x = 259,364,983.26
  5. Step 5: Solve for x
    x = 259,364,983.26/21,930.40
  6. Step 6: Final answer
    x = 11,826.73

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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.