Home / 15,665.43-21,618.63-8,591.84

Finding the Fourth Proportional to 15,665.43, 21,618.63 and 8,591.84

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Solution

The fourth proportional to 15,665.43, 21,618.63 and 8,591.84 is: 11,856.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,665.43 : 21,618.63 = 8,591.84 : x
  2. Step 2: Convert to fraction form
    15,665.43/21,618.63 = 8,591.84/x
  3. Step 3: Cross multiply
    15,665.43x = 21,618.63 × 8,591.84
  4. Step 4: Simplify right side
    15,665.43x = 185,743,701.89
  5. Step 5: Solve for x
    x = 185,743,701.89/15,665.43
  6. Step 6: Final answer
    x = 11,856.92

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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.