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Finding the Fourth Proportional to 7,715.70, 10,647.99 and 4,358.66

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Solution

The fourth proportional to 7,715.70, 10,647.99 and 4,358.66 is: 6,015.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,715.70 : 10,647.99 = 4,358.66 : x
  2. Step 2: Convert to fraction form
    7,715.70/10,647.99 = 4,358.66/x
  3. Step 3: Cross multiply
    7,715.70x = 10,647.99 × 4,358.66
  4. Step 4: Simplify right side
    7,715.70x = 46,410,914.85
  5. Step 5: Solve for x
    x = 46,410,914.85/7,715.70
  6. Step 6: Final answer
    x = 6,015.13

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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.