Home / 20,963.76-31,426.20-9,270.60

Finding the Fourth Proportional to 20,963.76, 31,426.20 and 9,270.60

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Solution

The fourth proportional to 20,963.76, 31,426.20 and 9,270.60 is: 13,897.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,963.76 : 31,426.20 = 9,270.60 : x
  2. Step 2: Convert to fraction form
    20,963.76/31,426.20 = 9,270.60/x
  3. Step 3: Cross multiply
    20,963.76x = 31,426.20 × 9,270.60
  4. Step 4: Simplify right side
    20,963.76x = 291,339,729.72
  5. Step 5: Solve for x
    x = 291,339,729.72/20,963.76
  6. Step 6: Final answer
    x = 13,897.30

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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.