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Finding the Fourth Proportional to 31,353.42, 47,028.84 and 7,980.44

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Solution

The fourth proportional to 31,353.42, 47,028.84 and 7,980.44 is: 11,970.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,353.42 : 47,028.84 = 7,980.44 : x
  2. Step 2: Convert to fraction form
    31,353.42/47,028.84 = 7,980.44/x
  3. Step 3: Cross multiply
    31,353.42x = 47,028.84 × 7,980.44
  4. Step 4: Simplify right side
    31,353.42x = 375,310,835.89
  5. Step 5: Solve for x
    x = 375,310,835.89/31,353.42
  6. Step 6: Final answer
    x = 11,970.33

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Double scale
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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.