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Finding the Fourth Proportional to 12,471.32, 17,212.64 and 7,435.87

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Solution

The fourth proportional to 12,471.32, 17,212.64 and 7,435.87 is: 10,262.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,471.32 : 17,212.64 = 7,435.87 : x
  2. Step 2: Convert to fraction form
    12,471.32/17,212.64 = 7,435.87/x
  3. Step 3: Cross multiply
    12,471.32x = 17,212.64 × 7,435.87
  4. Step 4: Simplify right side
    12,471.32x = 127,990,873.19
  5. Step 5: Solve for x
    x = 127,990,873.19/12,471.32
  6. Step 6: Final answer
    x = 10,262.81

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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.