Home / 31,352.40-47,028.60-18,910.80

Finding the Fourth Proportional to 31,352.40, 47,028.60 and 18,910.80

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Solution

The fourth proportional to 31,352.40, 47,028.60 and 18,910.80 is: 28,366.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,352.40 : 47,028.60 = 18,910.80 : x
  2. Step 2: Convert to fraction form
    31,352.40/47,028.60 = 18,910.80/x
  3. Step 3: Cross multiply
    31,352.40x = 47,028.60 × 18,910.80
  4. Step 4: Simplify right side
    31,352.40x = 889,348,448.88
  5. Step 5: Solve for x
    x = 889,348,448.88/31,352.40
  6. Step 6: Final answer
    x = 28,366.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.