Home / 15,292.90-21,105.21-8,578.99

Finding the Fourth Proportional to 15,292.90, 21,105.21 and 8,578.99

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Solution

The fourth proportional to 15,292.90, 21,105.21 and 8,578.99 is: 11,839.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,292.90 : 21,105.21 = 8,578.99 : x
  2. Step 2: Convert to fraction form
    15,292.90/21,105.21 = 8,578.99/x
  3. Step 3: Cross multiply
    15,292.90x = 21,105.21 × 8,578.99
  4. Step 4: Simplify right side
    15,292.90x = 181,061,385.54
  5. Step 5: Solve for x
    x = 181,061,385.54/15,292.90
  6. Step 6: Final answer
    x = 11,839.57

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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.