Home / 31,486.40-47,229.60-30,276.80

Finding the Fourth Proportional to 31,486.40, 47,229.60 and 30,276.80

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Solution

The fourth proportional to 31,486.40, 47,229.60 and 30,276.80 is: 45,415.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,486.40 : 47,229.60 = 30,276.80 : x
  2. Step 2: Convert to fraction form
    31,486.40/47,229.60 = 30,276.80/x
  3. Step 3: Cross multiply
    31,486.40x = 47,229.60 × 30,276.80
  4. Step 4: Simplify right side
    31,486.40x = 1,429,961,153.28
  5. Step 5: Solve for x
    x = 1,429,961,153.28/31,486.40
  6. Step 6: Final answer
    x = 45,415.20

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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.