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Finding the Fourth Proportional to 8,921.04, 12,299.84 and 5,728.70

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Solution

The fourth proportional to 8,921.04, 12,299.84 and 5,728.70 is: 7,898.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,921.04 : 12,299.84 = 5,728.70 : x
  2. Step 2: Convert to fraction form
    8,921.04/12,299.84 = 5,728.70/x
  3. Step 3: Cross multiply
    8,921.04x = 12,299.84 × 5,728.70
  4. Step 4: Simplify right side
    8,921.04x = 70,462,093.41
  5. Step 5: Solve for x
    x = 70,462,093.41/8,921.04
  6. Step 6: Final answer
    x = 7,898.42

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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.