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Finding the Fourth Proportional to 10,976.80, 16,465.20 and 8,352.40

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Solution

The fourth proportional to 10,976.80, 16,465.20 and 8,352.40 is: 12,528.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,976.80 : 16,465.20 = 8,352.40 : x
  2. Step 2: Convert to fraction form
    10,976.80/16,465.20 = 8,352.40/x
  3. Step 3: Cross multiply
    10,976.80x = 16,465.20 × 8,352.40
  4. Step 4: Simplify right side
    10,976.80x = 137,523,936.48
  5. Step 5: Solve for x
    x = 137,523,936.48/10,976.80
  6. Step 6: Final answer
    x = 12,528.60

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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.