Home / 31,156.77-42,991.26-18,408.19

Finding the Fourth Proportional to 31,156.77, 42,991.26 and 18,408.19

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Solution

The fourth proportional to 31,156.77, 42,991.26 and 18,408.19 is: 25,400.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,156.77 : 42,991.26 = 18,408.19 : x
  2. Step 2: Convert to fraction form
    31,156.77/42,991.26 = 18,408.19/x
  3. Step 3: Cross multiply
    31,156.77x = 42,991.26 × 18,408.19
  4. Step 4: Simplify right side
    31,156.77x = 791,391,067.46
  5. Step 5: Solve for x
    x = 791,391,067.46/31,156.77
  6. Step 6: Final answer
    x = 25,400.30

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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.