Home / 31,520.15-43,504.27-18,780.80

Finding the Fourth Proportional to 31,520.15, 43,504.27 and 18,780.80

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Solution

The fourth proportional to 31,520.15, 43,504.27 and 18,780.80 is: 25,921.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,520.15 : 43,504.27 = 18,780.80 : x
  2. Step 2: Convert to fraction form
    31,520.15/43,504.27 = 18,780.80/x
  3. Step 3: Cross multiply
    31,520.15x = 43,504.27 × 18,780.80
  4. Step 4: Simplify right side
    31,520.15x = 817,044,994.02
  5. Step 5: Solve for x
    x = 817,044,994.02/31,520.15
  6. Step 6: Final answer
    x = 25,921.35

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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.