Home / 21,219.18-31,824.68-20,165.48

Finding the Fourth Proportional to 21,219.18, 31,824.68 and 20,165.48

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Solution

The fourth proportional to 21,219.18, 31,824.68 and 20,165.48 is: 30,244.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,219.18 : 31,824.68 = 20,165.48 : x
  2. Step 2: Convert to fraction form
    21,219.18/31,824.68 = 20,165.48/x
  3. Step 3: Cross multiply
    21,219.18x = 31,824.68 × 20,165.48
  4. Step 4: Simplify right side
    21,219.18x = 641,759,688.10
  5. Step 5: Solve for x
    x = 641,759,688.10/21,219.18
  6. Step 6: Final answer
    x = 30,244.32

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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.