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Finding the Fourth Proportional to 7,978.88, 11,008.36 and 4,441.48

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Solution

The fourth proportional to 7,978.88, 11,008.36 and 4,441.48 is: 6,127.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,978.88 : 11,008.36 = 4,441.48 : x
  2. Step 2: Convert to fraction form
    7,978.88/11,008.36 = 4,441.48/x
  3. Step 3: Cross multiply
    7,978.88x = 11,008.36 × 4,441.48
  4. Step 4: Simplify right side
    7,978.88x = 48,893,410.77
  5. Step 5: Solve for x
    x = 48,893,410.77/7,978.88
  6. Step 6: Final answer
    x = 6,127.85

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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.