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Finding the Fourth Proportional to 15,881.10, 21,914.36 and 8,807.38

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Solution

The fourth proportional to 15,881.10, 21,914.36 and 8,807.38 is: 12,153.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,881.10 : 21,914.36 = 8,807.38 : x
  2. Step 2: Convert to fraction form
    15,881.10/21,914.36 = 8,807.38/x
  3. Step 3: Cross multiply
    15,881.10x = 21,914.36 × 8,807.38
  4. Step 4: Simplify right side
    15,881.10x = 193,008,095.98
  5. Step 5: Solve for x
    x = 193,008,095.98/15,881.10
  6. Step 6: Final answer
    x = 12,153.32

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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.