Home / 15,879.05-21,912.81-8,805.52

Finding the Fourth Proportional to 15,879.05, 21,912.81 and 8,805.52

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Solution

The fourth proportional to 15,879.05, 21,912.81 and 8,805.52 is: 12,151.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,879.05 : 21,912.81 = 8,805.52 : x
  2. Step 2: Convert to fraction form
    15,879.05/21,912.81 = 8,805.52/x
  3. Step 3: Cross multiply
    15,879.05x = 21,912.81 × 8,805.52
  4. Step 4: Simplify right side
    15,879.05x = 192,953,730.61
  5. Step 5: Solve for x
    x = 192,953,730.61/15,879.05
  6. Step 6: Final answer
    x = 12,151.47

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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.