Home / 31,345.60-43,259.20-20,716.80

Finding the Fourth Proportional to 31,345.60, 43,259.20 and 20,716.80

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Solution

The fourth proportional to 31,345.60, 43,259.20 and 20,716.80 is: 28,590.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,345.60 : 43,259.20 = 20,716.80 : x
  2. Step 2: Convert to fraction form
    31,345.60/43,259.20 = 20,716.80/x
  3. Step 3: Cross multiply
    31,345.60x = 43,259.20 × 20,716.80
  4. Step 4: Simplify right side
    31,345.60x = 896,192,194.56
  5. Step 5: Solve for x
    x = 896,192,194.56/31,345.60
  6. Step 6: Final answer
    x = 28,590.69

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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.