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Finding the Fourth Proportional to 8,812.99, 12,161.05 and 5,276.11

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Solution

The fourth proportional to 8,812.99, 12,161.05 and 5,276.11 is: 7,280.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,812.99 : 12,161.05 = 5,276.11 : x
  2. Step 2: Convert to fraction form
    8,812.99/12,161.05 = 5,276.11/x
  3. Step 3: Cross multiply
    8,812.99x = 12,161.05 × 5,276.11
  4. Step 4: Simplify right side
    8,812.99x = 64,163,037.52
  5. Step 5: Solve for x
    x = 64,163,037.52/8,812.99
  6. Step 6: Final answer
    x = 7,280.51

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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.