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Finding the Fourth Proportional to 9,435.18, 12,990.81 and 8,560.38

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Solution

The fourth proportional to 9,435.18, 12,990.81 and 8,560.38 is: 11,786.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,435.18 : 12,990.81 = 8,560.38 : x
  2. Step 2: Convert to fraction form
    9,435.18/12,990.81 = 8,560.38/x
  3. Step 3: Cross multiply
    9,435.18x = 12,990.81 × 8,560.38
  4. Step 4: Simplify right side
    9,435.18x = 111,206,270.11
  5. Step 5: Solve for x
    x = 111,206,270.11/9,435.18
  6. Step 6: Final answer
    x = 11,786.34

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Double scale
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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.