Home / 31,665.72-43,679.64-20,910.69

Finding the Fourth Proportional to 31,665.72, 43,679.64 and 20,910.69

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Solution

The fourth proportional to 31,665.72, 43,679.64 and 20,910.69 is: 28,844.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,665.72 : 43,679.64 = 20,910.69 : x
  2. Step 2: Convert to fraction form
    31,665.72/43,679.64 = 20,910.69/x
  3. Step 3: Cross multiply
    31,665.72x = 43,679.64 × 20,910.69
  4. Step 4: Simplify right side
    31,665.72x = 913,371,411.35
  5. Step 5: Solve for x
    x = 913,371,411.35/31,665.72
  6. Step 6: Final answer
    x = 28,844.17

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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.