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Finding the Fourth Proportional to 9,979.64, 13,772.07 and 5,999.99

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Solution

The fourth proportional to 9,979.64, 13,772.07 and 5,999.99 is: 8,280.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,979.64 : 13,772.07 = 5,999.99 : x
  2. Step 2: Convert to fraction form
    9,979.64/13,772.07 = 5,999.99/x
  3. Step 3: Cross multiply
    9,979.64x = 13,772.07 × 5,999.99
  4. Step 4: Simplify right side
    9,979.64x = 82,632,282.28
  5. Step 5: Solve for x
    x = 82,632,282.28/9,979.64
  6. Step 6: Final answer
    x = 8,280.09

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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.