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Finding the Fourth Proportional to 15,885.68, 21,924.87 and 8,814.38

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Solution

The fourth proportional to 15,885.68, 21,924.87 and 8,814.38 is: 12,165.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,885.68 : 21,924.87 = 8,814.38 : x
  2. Step 2: Convert to fraction form
    15,885.68/21,924.87 = 8,814.38/x
  3. Step 3: Cross multiply
    15,885.68x = 21,924.87 × 8,814.38
  4. Step 4: Simplify right side
    15,885.68x = 193,254,190.44
  5. Step 5: Solve for x
    x = 193,254,190.44/15,885.68
  6. Step 6: Final answer
    x = 12,165.31

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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.