Home / 21,025.28-31,540.95-6,980.54

Finding the Fourth Proportional to 21,025.28, 31,540.95 and 6,980.54

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Solution

The fourth proportional to 21,025.28, 31,540.95 and 6,980.54 is: 10,471.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,025.28 : 31,540.95 = 6,980.54 : x
  2. Step 2: Convert to fraction form
    21,025.28/31,540.95 = 6,980.54/x
  3. Step 3: Cross multiply
    21,025.28x = 31,540.95 × 6,980.54
  4. Step 4: Simplify right side
    21,025.28x = 220,172,863.11
  5. Step 5: Solve for x
    x = 220,172,863.11/21,025.28
  6. Step 6: Final answer
    x = 10,471.82

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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.