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Finding the Fourth Proportional to 32,878.76, 45,359.94 and 20,939.96

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Solution

The fourth proportional to 32,878.76, 45,359.94 and 20,939.96 is: 28,889.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    32,878.76 : 45,359.94 = 20,939.96 : x
  2. Step 2: Convert to fraction form
    32,878.76/45,359.94 = 20,939.96/x
  3. Step 3: Cross multiply
    32,878.76x = 45,359.94 × 20,939.96
  4. Step 4: Simplify right side
    32,878.76x = 949,835,329.20
  5. Step 5: Solve for x
    x = 949,835,329.20/32,878.76
  6. Step 6: Final answer
    x = 28,889.03

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.