Home / 31,009.60-42,778.20-18,425.44

Finding the Fourth Proportional to 31,009.60, 42,778.20 and 18,425.44

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Solution

The fourth proportional to 31,009.60, 42,778.20 and 18,425.44 is: 25,418.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,009.60 : 42,778.20 = 18,425.44 : x
  2. Step 2: Convert to fraction form
    31,009.60/42,778.20 = 18,425.44/x
  3. Step 3: Cross multiply
    31,009.60x = 42,778.20 × 18,425.44
  4. Step 4: Simplify right side
    31,009.60x = 788,207,157.41
  5. Step 5: Solve for x
    x = 788,207,157.41/31,009.60
  6. Step 6: Final answer
    x = 25,418.17

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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.