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Finding the Fourth Proportional to 6,281.80, 9,411.90 and 5,309.80

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Solution

The fourth proportional to 6,281.80, 9,411.90 and 5,309.80 is: 7,955.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,281.80 : 9,411.90 = 5,309.80 : x
  2. Step 2: Convert to fraction form
    6,281.80/9,411.90 = 5,309.80/x
  3. Step 3: Cross multiply
    6,281.80x = 9,411.90 × 5,309.80
  4. Step 4: Simplify right side
    6,281.80x = 49,975,306.62
  5. Step 5: Solve for x
    x = 49,975,306.62/6,281.80
  6. Step 6: Final answer
    x = 7,955.57

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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.