Home / 21,789.60-32,661-8,623.68

Finding the Fourth Proportional to 21,789.60, 32,661 and 8,623.68

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Solution

The fourth proportional to 21,789.60, 32,661 and 8,623.68 is: 12,926.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,789.60 : 32,661 = 8,623.68 : x
  2. Step 2: Convert to fraction form
    21,789.60/32,661 = 8,623.68/x
  3. Step 3: Cross multiply
    21,789.60x = 32,661 × 8,623.68
  4. Step 4: Simplify right side
    21,789.60x = 281,658,012.48
  5. Step 5: Solve for x
    x = 281,658,012.48/21,789.60
  6. Step 6: Final answer
    x = 12,926.26

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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.