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Finding the Fourth Proportional to 8,280.80, 12,400.08 and 6,898.40

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Solution

The fourth proportional to 8,280.80, 12,400.08 and 6,898.40 is: 10,330.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,280.80 : 12,400.08 = 6,898.40 : x
  2. Step 2: Convert to fraction form
    8,280.80/12,400.08 = 6,898.40/x
  3. Step 3: Cross multiply
    8,280.80x = 12,400.08 × 6,898.40
  4. Step 4: Simplify right side
    8,280.80x = 85,540,711.87
  5. Step 5: Solve for x
    x = 85,540,711.87/8,280.80
  6. Step 6: Final answer
    x = 10,330.01

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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.