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Finding the Fourth Proportional to 10,961.84, 16,478.40 and 8,794.28

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Solution

The fourth proportional to 10,961.84, 16,478.40 and 8,794.28 is: 13,220.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,961.84 : 16,478.40 = 8,794.28 : x
  2. Step 2: Convert to fraction form
    10,961.84/16,478.40 = 8,794.28/x
  3. Step 3: Cross multiply
    10,961.84x = 16,478.40 × 8,794.28
  4. Step 4: Simplify right side
    10,961.84x = 144,915,663.55
  5. Step 5: Solve for x
    x = 144,915,663.55/10,961.84
  6. Step 6: Final answer
    x = 13,220.01

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.