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Finding the Fourth Proportional to 7,815.79, 11,778.55 and 7,036.57

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Solution

The fourth proportional to 7,815.79, 11,778.55 and 7,036.57 is: 10,604.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,815.79 : 11,778.55 = 7,036.57 : x
  2. Step 2: Convert to fraction form
    7,815.79/11,778.55 = 7,036.57/x
  3. Step 3: Cross multiply
    7,815.79x = 11,778.55 × 7,036.57
  4. Step 4: Simplify right side
    7,815.79x = 82,880,591.57
  5. Step 5: Solve for x
    x = 82,880,591.57/7,815.79
  6. Step 6: Final answer
    x = 10,604.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.