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Finding the Fourth Proportional to 10,947.80, 16,440.90 and 10,602.20

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Solution

The fourth proportional to 10,947.80, 16,440.90 and 10,602.20 is: 15,921.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,947.80 : 16,440.90 = 10,602.20 : x
  2. Step 2: Convert to fraction form
    10,947.80/16,440.90 = 10,602.20/x
  3. Step 3: Cross multiply
    10,947.80x = 16,440.90 × 10,602.20
  4. Step 4: Simplify right side
    10,947.80x = 174,309,709.98
  5. Step 5: Solve for x
    x = 174,309,709.98/10,947.80
  6. Step 6: Final answer
    x = 15,921.89

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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.