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Finding the Fourth Proportional to 21,998.90, 32,998.35 and 10,901.30

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Solution

The fourth proportional to 21,998.90, 32,998.35 and 10,901.30 is: 16,351.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,998.90 : 32,998.35 = 10,901.30 : x
  2. Step 2: Convert to fraction form
    21,998.90/32,998.35 = 10,901.30/x
  3. Step 3: Cross multiply
    21,998.90x = 32,998.35 × 10,901.30
  4. Step 4: Simplify right side
    21,998.90x = 359,724,912.86
  5. Step 5: Solve for x
    x = 359,724,912.86/21,998.90
  6. Step 6: Final answer
    x = 16,351.95

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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.