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Finding the Fourth Proportional to 9,187.32, 12,678 and 5,649.24

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Solution

The fourth proportional to 9,187.32, 12,678 and 5,649.24 is: 7,795.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,187.32 : 12,678 = 5,649.24 : x
  2. Step 2: Convert to fraction form
    9,187.32/12,678 = 5,649.24/x
  3. Step 3: Cross multiply
    9,187.32x = 12,678 × 5,649.24
  4. Step 4: Simplify right side
    9,187.32x = 71,621,064.72
  5. Step 5: Solve for x
    x = 71,621,064.72/9,187.32
  6. Step 6: Final answer
    x = 7,795.64

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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.