Home / 15,665.32-21,618.12-8,591.77

Finding the Fourth Proportional to 15,665.32, 21,618.12 and 8,591.77

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Solution

The fourth proportional to 15,665.32, 21,618.12 and 8,591.77 is: 11,856.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,665.32 : 21,618.12 = 8,591.77 : x
  2. Step 2: Convert to fraction form
    15,665.32/21,618.12 = 8,591.77/x
  3. Step 3: Cross multiply
    15,665.32x = 21,618.12 × 8,591.77
  4. Step 4: Simplify right side
    15,665.32x = 185,737,914.87
  5. Step 5: Solve for x
    x = 185,737,914.87/15,665.32
  6. Step 6: Final answer
    x = 11,856.63

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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.