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Finding the Fourth Proportional to 11,979.89, 17,970.71 and 4,860.71

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Solution

The fourth proportional to 11,979.89, 17,970.71 and 4,860.71 is: 7,291.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,979.89 : 17,970.71 = 4,860.71 : x
  2. Step 2: Convert to fraction form
    11,979.89/17,970.71 = 4,860.71/x
  3. Step 3: Cross multiply
    11,979.89x = 17,970.71 × 4,860.71
  4. Step 4: Simplify right side
    11,979.89x = 87,350,295.65
  5. Step 5: Solve for x
    x = 87,350,295.65/11,979.89
  6. Step 6: Final answer
    x = 7,291.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.