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Finding the Fourth Proportional to 7,978.06, 11,967.09 and 3,590.39

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Solution

The fourth proportional to 7,978.06, 11,967.09 and 3,590.39 is: 5,385.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,978.06 : 11,967.09 = 3,590.39 : x
  2. Step 2: Convert to fraction form
    7,978.06/11,967.09 = 3,590.39/x
  3. Step 3: Cross multiply
    7,978.06x = 11,967.09 × 3,590.39
  4. Step 4: Simplify right side
    7,978.06x = 42,966,536.72
  5. Step 5: Solve for x
    x = 42,966,536.72/7,978.06
  6. Step 6: Final answer
    x = 5,385.59

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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.