Home / 21,286.10-31,929.15-5,491.10

Finding the Fourth Proportional to 21,286.10, 31,929.15 and 5,491.10

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Solution

The fourth proportional to 21,286.10, 31,929.15 and 5,491.10 is: 8,236.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,286.10 : 31,929.15 = 5,491.10 : x
  2. Step 2: Convert to fraction form
    21,286.10/31,929.15 = 5,491.10/x
  3. Step 3: Cross multiply
    21,286.10x = 31,929.15 × 5,491.10
  4. Step 4: Simplify right side
    21,286.10x = 175,326,155.57
  5. Step 5: Solve for x
    x = 175,326,155.57/21,286.10
  6. Step 6: Final answer
    x = 8,236.65

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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.