Home / 15,717.18-23,578.56-5,187.78

Finding the Fourth Proportional to 15,717.18, 23,578.56 and 5,187.78

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Solution

The fourth proportional to 15,717.18, 23,578.56 and 5,187.78 is: 7,782.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,717.18 : 23,578.56 = 5,187.78 : x
  2. Step 2: Convert to fraction form
    15,717.18/23,578.56 = 5,187.78/x
  3. Step 3: Cross multiply
    15,717.18x = 23,578.56 × 5,187.78
  4. Step 4: Simplify right side
    15,717.18x = 122,320,382.00
  5. Step 5: Solve for x
    x = 122,320,382.00/15,717.18
  6. Step 6: Final answer
    x = 7,782.59

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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.