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Finding the Fourth Proportional to 15,699.22, 21,664.86 and 8,529.10

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Solution

The fourth proportional to 15,699.22, 21,664.86 and 8,529.10 is: 11,770.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,699.22 : 21,664.86 = 8,529.10 : x
  2. Step 2: Convert to fraction form
    15,699.22/21,664.86 = 8,529.10/x
  3. Step 3: Cross multiply
    15,699.22x = 21,664.86 × 8,529.10
  4. Step 4: Simplify right side
    15,699.22x = 184,781,757.43
  5. Step 5: Solve for x
    x = 184,781,757.43/15,699.22
  6. Step 6: Final answer
    x = 11,770.12

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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.