Home / 21,214.28-31,821.42-5,631.50

Finding the Fourth Proportional to 21,214.28, 31,821.42 and 5,631.50

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Solution

The fourth proportional to 21,214.28, 31,821.42 and 5,631.50 is: 8,447.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,214.28 : 31,821.42 = 5,631.50 : x
  2. Step 2: Convert to fraction form
    21,214.28/31,821.42 = 5,631.50/x
  3. Step 3: Cross multiply
    21,214.28x = 31,821.42 × 5,631.50
  4. Step 4: Simplify right side
    21,214.28x = 179,202,326.73
  5. Step 5: Solve for x
    x = 179,202,326.73/21,214.28
  6. Step 6: Final answer
    x = 8,447.25

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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.