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Finding the Fourth Proportional to 15,646.80, 21,591.72 and 8,571.82

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Solution

The fourth proportional to 15,646.80, 21,591.72 and 8,571.82 is: 11,828.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,646.80 : 21,591.72 = 8,571.82 : x
  2. Step 2: Convert to fraction form
    15,646.80/21,591.72 = 8,571.82/x
  3. Step 3: Cross multiply
    15,646.80x = 21,591.72 × 8,571.82
  4. Step 4: Simplify right side
    15,646.80x = 185,080,337.33
  5. Step 5: Solve for x
    x = 185,080,337.33/15,646.80
  6. Step 6: Final answer
    x = 11,828.64

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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.