Home / 31,411.16-43,357.52-20,111.09

Finding the Fourth Proportional to 31,411.16, 43,357.52 and 20,111.09

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Solution

The fourth proportional to 31,411.16, 43,357.52 and 20,111.09 is: 27,759.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,411.16 : 43,357.52 = 20,111.09 : x
  2. Step 2: Convert to fraction form
    31,411.16/43,357.52 = 20,111.09/x
  3. Step 3: Cross multiply
    31,411.16x = 43,357.52 × 20,111.09
  4. Step 4: Simplify right side
    31,411.16x = 871,966,669.55
  5. Step 5: Solve for x
    x = 871,966,669.55/31,411.16
  6. Step 6: Final answer
    x = 27,759.78

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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.