Home / 31,415.67-47,118.65-20,400.48

Finding the Fourth Proportional to 31,415.67, 47,118.65 and 20,400.48

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Solution

The fourth proportional to 31,415.67, 47,118.65 and 20,400.48 is: 30,597.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,415.67 : 47,118.65 = 20,400.48 : x
  2. Step 2: Convert to fraction form
    31,415.67/47,118.65 = 20,400.48/x
  3. Step 3: Cross multiply
    31,415.67x = 47,118.65 × 20,400.48
  4. Step 4: Simplify right side
    31,415.67x = 961,242,974.95
  5. Step 5: Solve for x
    x = 961,242,974.95/31,415.67
  6. Step 6: Final answer
    x = 30,597.56

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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.