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Finding the Fourth Proportional to 15,665.93, 21,618.69 and 8,859.84

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Solution

The fourth proportional to 15,665.93, 21,618.69 and 8,859.84 is: 12,226.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,665.93 : 21,618.69 = 8,859.84 : x
  2. Step 2: Convert to fraction form
    15,665.93/21,618.69 = 8,859.84/x
  3. Step 3: Cross multiply
    15,665.93x = 21,618.69 × 8,859.84
  4. Step 4: Simplify right side
    15,665.93x = 191,538,106.96
  5. Step 5: Solve for x
    x = 191,538,106.96/15,665.93
  6. Step 6: Final answer
    x = 12,226.41

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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.