Home / 10,811.20-16,216.80-9,966.40

Finding the Fourth Proportional to 10,811.20, 16,216.80 and 9,966.40

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Solution

The fourth proportional to 10,811.20, 16,216.80 and 9,966.40 is: 14,949.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,811.20 : 16,216.80 = 9,966.40 : x
  2. Step 2: Convert to fraction form
    10,811.20/16,216.80 = 9,966.40/x
  3. Step 3: Cross multiply
    10,811.20x = 16,216.80 × 9,966.40
  4. Step 4: Simplify right side
    10,811.20x = 161,623,115.52
  5. Step 5: Solve for x
    x = 161,623,115.52/10,811.20
  6. Step 6: Final answer
    x = 14,949.60

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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.