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Finding the Fourth Proportional to 7,013.33, 9,678.11 and 3,869.45

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Solution

The fourth proportional to 7,013.33, 9,678.11 and 3,869.45 is: 5,339.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,013.33 : 9,678.11 = 3,869.45 : x
  2. Step 2: Convert to fraction form
    7,013.33/9,678.11 = 3,869.45/x
  3. Step 3: Cross multiply
    7,013.33x = 9,678.11 × 3,869.45
  4. Step 4: Simplify right side
    7,013.33x = 37,448,895.00
  5. Step 5: Solve for x
    x = 37,448,895.00/7,013.33
  6. Step 6: Final answer
    x = 5,339.68

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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.