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Finding the Fourth Proportional to 12,651.53, 18,979.11 and 3,887.12

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Solution

The fourth proportional to 12,651.53, 18,979.11 and 3,887.12 is: 5,831.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,651.53 : 18,979.11 = 3,887.12 : x
  2. Step 2: Convert to fraction form
    12,651.53/18,979.11 = 3,887.12/x
  3. Step 3: Cross multiply
    12,651.53x = 18,979.11 × 3,887.12
  4. Step 4: Simplify right side
    12,651.53x = 73,774,125.51
  5. Step 5: Solve for x
    x = 73,774,125.51/12,651.53
  6. Step 6: Final answer
    x = 5,831.24

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.