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Finding the Fourth Proportional to 9,769.60, 13,486.08 and 6,978.88

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Solution

The fourth proportional to 9,769.60, 13,486.08 and 6,978.88 is: 9,633.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,769.60 : 13,486.08 = 6,978.88 : x
  2. Step 2: Convert to fraction form
    9,769.60/13,486.08 = 6,978.88/x
  3. Step 3: Cross multiply
    9,769.60x = 13,486.08 × 6,978.88
  4. Step 4: Simplify right side
    9,769.60x = 94,117,733.99
  5. Step 5: Solve for x
    x = 94,117,733.99/9,769.60
  6. Step 6: Final answer
    x = 9,633.73

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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.