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Finding the Fourth Proportional to 11,355.28, 15,669.06 and 6,318.70

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Solution

The fourth proportional to 11,355.28, 15,669.06 and 6,318.70 is: 8,719.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,355.28 : 15,669.06 = 6,318.70 : x
  2. Step 2: Convert to fraction form
    11,355.28/15,669.06 = 6,318.70/x
  3. Step 3: Cross multiply
    11,355.28x = 15,669.06 × 6,318.70
  4. Step 4: Simplify right side
    11,355.28x = 99,008,089.42
  5. Step 5: Solve for x
    x = 99,008,089.42/11,355.28
  6. Step 6: Final answer
    x = 8,719.12

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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.