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Finding the Fourth Proportional to 15,665.71, 21,619.16 and 8,592.61

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Solution

The fourth proportional to 15,665.71, 21,619.16 and 8,592.61 is: 11,858.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,665.71 : 21,619.16 = 8,592.61 : x
  2. Step 2: Convert to fraction form
    15,665.71/21,619.16 = 8,592.61/x
  3. Step 3: Cross multiply
    15,665.71x = 21,619.16 × 8,592.61
  4. Step 4: Simplify right side
    15,665.71x = 185,765,010.41
  5. Step 5: Solve for x
    x = 185,765,010.41/15,665.71
  6. Step 6: Final answer
    x = 11,858.07

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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.