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Finding the Fourth Proportional to 7,976.88, 10,990.08 and 5,877.36

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Solution

The fourth proportional to 7,976.88, 10,990.08 and 5,877.36 is: 8,097.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,976.88 : 10,990.08 = 5,877.36 : x
  2. Step 2: Convert to fraction form
    7,976.88/10,990.08 = 5,877.36/x
  3. Step 3: Cross multiply
    7,976.88x = 10,990.08 × 5,877.36
  4. Step 4: Simplify right side
    7,976.88x = 64,592,656.59
  5. Step 5: Solve for x
    x = 64,592,656.59/7,976.88
  6. Step 6: Final answer
    x = 8,097.48

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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.