Home / 22,811.64-31,476.20-12,739.70

Finding the Fourth Proportional to 22,811.64, 31,476.20 and 12,739.70

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Solution

The fourth proportional to 22,811.64, 31,476.20 and 12,739.70 is: 17,578.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,811.64 : 31,476.20 = 12,739.70 : x
  2. Step 2: Convert to fraction form
    22,811.64/31,476.20 = 12,739.70/x
  3. Step 3: Cross multiply
    22,811.64x = 31,476.20 × 12,739.70
  4. Step 4: Simplify right side
    22,811.64x = 400,997,345.14
  5. Step 5: Solve for x
    x = 400,997,345.14/22,811.64
  6. Step 6: Final answer
    x = 17,578.63

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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.