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Finding the Fourth Proportional to 10,959.80, 16,439.70 and 9,620.60

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Solution

The fourth proportional to 10,959.80, 16,439.70 and 9,620.60 is: 14,430.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,959.80 : 16,439.70 = 9,620.60 : x
  2. Step 2: Convert to fraction form
    10,959.80/16,439.70 = 9,620.60/x
  3. Step 3: Cross multiply
    10,959.80x = 16,439.70 × 9,620.60
  4. Step 4: Simplify right side
    10,959.80x = 158,159,777.82
  5. Step 5: Solve for x
    x = 158,159,777.82/10,959.80
  6. Step 6: Final answer
    x = 14,430.90

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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.