Home / 31,990.20-47,985.30-30,046.20

Finding the Fourth Proportional to 31,990.20, 47,985.30 and 30,046.20

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Solution

The fourth proportional to 31,990.20, 47,985.30 and 30,046.20 is: 45,069.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,990.20 : 47,985.30 = 30,046.20 : x
  2. Step 2: Convert to fraction form
    31,990.20/47,985.30 = 30,046.20/x
  3. Step 3: Cross multiply
    31,990.20x = 47,985.30 × 30,046.20
  4. Step 4: Simplify right side
    31,990.20x = 1,441,775,920.86
  5. Step 5: Solve for x
    x = 1,441,775,920.86/31,990.20
  6. Step 6: Final answer
    x = 45,069.30

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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.