Home / 21,863.08-32,820.68-20,971.88

Finding the Fourth Proportional to 21,863.08, 32,820.68 and 20,971.88

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Solution

The fourth proportional to 21,863.08, 32,820.68 and 20,971.88 is: 31,482.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,863.08 : 32,820.68 = 20,971.88 : x
  2. Step 2: Convert to fraction form
    21,863.08/32,820.68 = 20,971.88/x
  3. Step 3: Cross multiply
    21,863.08x = 32,820.68 × 20,971.88
  4. Step 4: Simplify right side
    21,863.08x = 688,311,362.48
  5. Step 5: Solve for x
    x = 688,311,362.48/21,863.08
  6. Step 6: Final answer
    x = 31,482.82

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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.