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Finding the Fourth Proportional to 21,958.71, 32,924.72 and 8,615.73

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Solution

The fourth proportional to 21,958.71, 32,924.72 and 8,615.73 is: 12,918.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,958.71 : 32,924.72 = 8,615.73 : x
  2. Step 2: Convert to fraction form
    21,958.71/32,924.72 = 8,615.73/x
  3. Step 3: Cross multiply
    21,958.71x = 32,924.72 × 8,615.73
  4. Step 4: Simplify right side
    21,958.71x = 283,670,454.77
  5. Step 5: Solve for x
    x = 283,670,454.77/21,958.71
  6. Step 6: Final answer
    x = 12,918.36

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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.