Home / 31,087.36-42,901.14-18,519.40

Finding the Fourth Proportional to 31,087.36, 42,901.14 and 18,519.40

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Solution

The fourth proportional to 31,087.36, 42,901.14 and 18,519.40 is: 25,557.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,087.36 : 42,901.14 = 18,519.40 : x
  2. Step 2: Convert to fraction form
    31,087.36/42,901.14 = 18,519.40/x
  3. Step 3: Cross multiply
    31,087.36x = 42,901.14 × 18,519.40
  4. Step 4: Simplify right side
    31,087.36x = 794,503,372.12
  5. Step 5: Solve for x
    x = 794,503,372.12/31,087.36
  6. Step 6: Final answer
    x = 25,557.12

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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.