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Finding the Fourth Proportional to 32,009.80, 47,985.90 and 20,921.80

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Solution

The fourth proportional to 32,009.80, 47,985.90 and 20,921.80 is: 31,363.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    32,009.80 : 47,985.90 = 20,921.80 : x
  2. Step 2: Convert to fraction form
    32,009.80/47,985.90 = 20,921.80/x
  3. Step 3: Cross multiply
    32,009.80x = 47,985.90 × 20,921.80
  4. Step 4: Simplify right side
    32,009.80x = 1,003,951,402.62
  5. Step 5: Solve for x
    x = 1,003,951,402.62/32,009.80
  6. Step 6: Final answer
    x = 31,363.88

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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.