Home / 15,355.25-21,190.33-8,640.99

Finding the Fourth Proportional to 15,355.25, 21,190.33 and 8,640.99

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Solution

The fourth proportional to 15,355.25, 21,190.33 and 8,640.99 is: 11,924.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,355.25 : 21,190.33 = 8,640.99 : x
  2. Step 2: Convert to fraction form
    15,355.25/21,190.33 = 8,640.99/x
  3. Step 3: Cross multiply
    15,355.25x = 21,190.33 × 8,640.99
  4. Step 4: Simplify right side
    15,355.25x = 183,105,429.63
  5. Step 5: Solve for x
    x = 183,105,429.63/15,355.25
  6. Step 6: Final answer
    x = 11,924.61

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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.