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Finding the Fourth Proportional to 8,978.58, 12,402.12 and 6,841.08

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Solution

The fourth proportional to 8,978.58, 12,402.12 and 6,841.08 is: 9,449.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,978.58 : 12,402.12 = 6,841.08 : x
  2. Step 2: Convert to fraction form
    8,978.58/12,402.12 = 6,841.08/x
  3. Step 3: Cross multiply
    8,978.58x = 12,402.12 × 6,841.08
  4. Step 4: Simplify right side
    8,978.58x = 84,843,895.09
  5. Step 5: Solve for x
    x = 84,843,895.09/8,978.58
  6. Step 6: Final answer
    x = 9,449.59

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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.