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Finding the Fourth Proportional to 9,155.00, 12,629.05 and 6,171.80

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Solution

The fourth proportional to 9,155.00, 12,629.05 and 6,171.80 is: 8,513.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,155.00 : 12,629.05 = 6,171.80 : x
  2. Step 2: Convert to fraction form
    9,155.00/12,629.05 = 6,171.80/x
  3. Step 3: Cross multiply
    9,155.00x = 12,629.05 × 6,171.80
  4. Step 4: Simplify right side
    9,155.00x = 77,943,892.22
  5. Step 5: Solve for x
    x = 77,943,892.22/9,155.00
  6. Step 6: Final answer
    x = 8,513.80

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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.