Home / 15,456.65-21,329.71-8,558.12

Finding the Fourth Proportional to 15,456.65, 21,329.71 and 8,558.12

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Solution

The fourth proportional to 15,456.65, 21,329.71 and 8,558.12 is: 11,809.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,456.65 : 21,329.71 = 8,558.12 : x
  2. Step 2: Convert to fraction form
    15,456.65/21,329.71 = 8,558.12/x
  3. Step 3: Cross multiply
    15,456.65x = 21,329.71 × 8,558.12
  4. Step 4: Simplify right side
    15,456.65x = 182,542,217.75
  5. Step 5: Solve for x
    x = 182,542,217.75/15,456.65
  6. Step 6: Final answer
    x = 11,809.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.