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Finding the Fourth Proportional to 7,866.99, 10,856.21 and 4,330.12

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Solution

The fourth proportional to 7,866.99, 10,856.21 and 4,330.12 is: 5,975.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,866.99 : 10,856.21 = 4,330.12 : x
  2. Step 2: Convert to fraction form
    7,866.99/10,856.21 = 4,330.12/x
  3. Step 3: Cross multiply
    7,866.99x = 10,856.21 × 4,330.12
  4. Step 4: Simplify right side
    7,866.99x = 47,008,692.05
  5. Step 5: Solve for x
    x = 47,008,692.05/7,866.99
  6. Step 6: Final answer
    x = 5,975.44

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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.