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Finding the Fourth Proportional to 15,880.87, 21,914.85 and 8,807.14

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Solution

The fourth proportional to 15,880.87, 21,914.85 and 8,807.14 is: 12,153.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,880.87 : 21,914.85 = 8,807.14 : x
  2. Step 2: Convert to fraction form
    15,880.87/21,914.85 = 8,807.14/x
  3. Step 3: Cross multiply
    15,880.87x = 21,914.85 × 8,807.14
  4. Step 4: Simplify right side
    15,880.87x = 193,007,152.03
  5. Step 5: Solve for x
    x = 193,007,152.03/15,880.87
  6. Step 6: Final answer
    x = 12,153.44

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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.