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Finding the Fourth Proportional to 15,593.94, 21,520.15 and 8,879.85

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Solution

The fourth proportional to 15,593.94, 21,520.15 and 8,879.85 is: 12,254.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,593.94 : 21,520.15 = 8,879.85 : x
  2. Step 2: Convert to fraction form
    15,593.94/21,520.15 = 8,879.85/x
  3. Step 3: Cross multiply
    15,593.94x = 21,520.15 × 8,879.85
  4. Step 4: Simplify right side
    15,593.94x = 191,095,681.78
  5. Step 5: Solve for x
    x = 191,095,681.78/15,593.94
  6. Step 6: Final answer
    x = 12,254.48

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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.