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Finding the Fourth Proportional to 9,187.73, 12,678.81 and 5,209.01

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Solution

The fourth proportional to 9,187.73, 12,678.81 and 5,209.01 is: 7,188.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,187.73 : 12,678.81 = 5,209.01 : x
  2. Step 2: Convert to fraction form
    9,187.73/12,678.81 = 5,209.01/x
  3. Step 3: Cross multiply
    9,187.73x = 12,678.81 × 5,209.01
  4. Step 4: Simplify right side
    9,187.73x = 66,043,984.68
  5. Step 5: Solve for x
    x = 66,043,984.68/9,187.73
  6. Step 6: Final answer
    x = 7,188.28

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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.