Home / 21,219.71-31,822.90-7,177.12

Finding the Fourth Proportional to 21,219.71, 31,822.90 and 7,177.12

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Solution

The fourth proportional to 21,219.71, 31,822.90 and 7,177.12 is: 10,763.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,219.71 : 31,822.90 = 7,177.12 : x
  2. Step 2: Convert to fraction form
    21,219.71/31,822.90 = 7,177.12/x
  3. Step 3: Cross multiply
    21,219.71x = 31,822.90 × 7,177.12
  4. Step 4: Simplify right side
    21,219.71x = 228,396,739.48
  5. Step 5: Solve for x
    x = 228,396,739.48/21,219.71
  6. Step 6: Final answer
    x = 10,763.42

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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.