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Finding the Fourth Proportional to 9,778.86, 13,505.94 and 6,629.58

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Solution

The fourth proportional to 9,778.86, 13,505.94 and 6,629.58 is: 9,156.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,778.86 : 13,505.94 = 6,629.58 : x
  2. Step 2: Convert to fraction form
    9,778.86/13,505.94 = 6,629.58/x
  3. Step 3: Cross multiply
    9,778.86x = 13,505.94 × 6,629.58
  4. Step 4: Simplify right side
    9,778.86x = 89,538,709.71
  5. Step 5: Solve for x
    x = 89,538,709.71/9,778.86
  6. Step 6: Final answer
    x = 9,156.35

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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.