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Finding the Fourth Proportional to 7,960.40, 10,984.80 and 4,423.40

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Solution

The fourth proportional to 7,960.40, 10,984.80 and 4,423.40 is: 6,103.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,960.40 : 10,984.80 = 4,423.40 : x
  2. Step 2: Convert to fraction form
    7,960.40/10,984.80 = 4,423.40/x
  3. Step 3: Cross multiply
    7,960.40x = 10,984.80 × 4,423.40
  4. Step 4: Simplify right side
    7,960.40x = 48,590,164.32
  5. Step 5: Solve for x
    x = 48,590,164.32/7,960.40
  6. Step 6: Final answer
    x = 6,103.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.