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Finding the Fourth Proportional to 21,998.70, 32,985.90 and 8,836.20

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Solution

The fourth proportional to 21,998.70, 32,985.90 and 8,836.20 is: 13,249.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,998.70 : 32,985.90 = 8,836.20 : x
  2. Step 2: Convert to fraction form
    21,998.70/32,985.90 = 8,836.20/x
  3. Step 3: Cross multiply
    21,998.70x = 32,985.90 × 8,836.20
  4. Step 4: Simplify right side
    21,998.70x = 291,470,009.58
  5. Step 5: Solve for x
    x = 291,470,009.58/21,998.70
  6. Step 6: Final answer
    x = 13,249.42

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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.