Home / 31,801.08-43,901.28-19,871.04

Finding the Fourth Proportional to 31,801.08, 43,901.28 and 19,871.04

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Solution

The fourth proportional to 31,801.08, 43,901.28 and 19,871.04 is: 27,431.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,801.08 : 43,901.28 = 19,871.04 : x
  2. Step 2: Convert to fraction form
    31,801.08/43,901.28 = 19,871.04/x
  3. Step 3: Cross multiply
    31,801.08x = 43,901.28 × 19,871.04
  4. Step 4: Simplify right side
    31,801.08x = 872,364,090.93
  5. Step 5: Solve for x
    x = 872,364,090.93/31,801.08
  6. Step 6: Final answer
    x = 27,431.90

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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.