Home / 31,618.08-47,420.16-20,339.52

Finding the Fourth Proportional to 31,618.08, 47,420.16 and 20,339.52

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Solution

The fourth proportional to 31,618.08, 47,420.16 and 20,339.52 is: 30,504.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,618.08 : 47,420.16 = 20,339.52 : x
  2. Step 2: Convert to fraction form
    31,618.08/47,420.16 = 20,339.52/x
  3. Step 3: Cross multiply
    31,618.08x = 47,420.16 × 20,339.52
  4. Step 4: Simplify right side
    31,618.08x = 964,503,292.72
  5. Step 5: Solve for x
    x = 964,503,292.72/31,618.08
  6. Step 6: Final answer
    x = 30,504.80

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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.