Home / 31,178.28-43,045.38-19,854.12

Finding the Fourth Proportional to 31,178.28, 43,045.38 and 19,854.12

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Solution

The fourth proportional to 31,178.28, 43,045.38 and 19,854.12 is: 27,411.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,178.28 : 43,045.38 = 19,854.12 : x
  2. Step 2: Convert to fraction form
    31,178.28/43,045.38 = 19,854.12/x
  3. Step 3: Cross multiply
    31,178.28x = 43,045.38 × 19,854.12
  4. Step 4: Simplify right side
    31,178.28x = 854,628,139.97
  5. Step 5: Solve for x
    x = 854,628,139.97/31,178.28
  6. Step 6: Final answer
    x = 27,411.01

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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.