Home / 9,318.98-12,864.20-6,661.78

Finding the Fourth Proportional to 9,318.98, 12,864.20 and 6,661.78

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Solution

The fourth proportional to 9,318.98, 12,864.20 and 6,661.78 is: 9,196.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,318.98 : 12,864.20 = 6,661.78 : x
  2. Step 2: Convert to fraction form
    9,318.98/12,864.20 = 6,661.78/x
  3. Step 3: Cross multiply
    9,318.98x = 12,864.20 × 6,661.78
  4. Step 4: Simplify right side
    9,318.98x = 85,698,470.28
  5. Step 5: Solve for x
    x = 85,698,470.28/9,318.98
  6. Step 6: Final answer
    x = 9,196.12

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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.