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Finding the Fourth Proportional to 9,318.76, 12,860.13 and 5,070.09

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Solution

The fourth proportional to 9,318.76, 12,860.13 and 5,070.09 is: 6,996.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,318.76 : 12,860.13 = 5,070.09 : x
  2. Step 2: Convert to fraction form
    9,318.76/12,860.13 = 5,070.09/x
  3. Step 3: Cross multiply
    9,318.76x = 12,860.13 × 5,070.09
  4. Step 4: Simplify right side
    9,318.76x = 65,202,016.51
  5. Step 5: Solve for x
    x = 65,202,016.51/9,318.76
  6. Step 6: Final answer
    x = 6,996.86

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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.