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Finding the Fourth Proportional to 21,903.20, 32,806.20 and 18,015.20

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Solution

The fourth proportional to 21,903.20, 32,806.20 and 18,015.20 is: 26,982.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,903.20 : 32,806.20 = 18,015.20 : x
  2. Step 2: Convert to fraction form
    21,903.20/32,806.20 = 18,015.20/x
  3. Step 3: Cross multiply
    21,903.20x = 32,806.20 × 18,015.20
  4. Step 4: Simplify right side
    21,903.20x = 591,010,254.24
  5. Step 5: Solve for x
    x = 591,010,254.24/21,903.20
  6. Step 6: Final answer
    x = 26,982.83

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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.