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Finding the Fourth Proportional to 32,840.32, 45,334.56 and 20,920

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Solution

The fourth proportional to 32,840.32, 45,334.56 and 20,920 is: 28,879.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    32,840.32 : 45,334.56 = 20,920 : x
  2. Step 2: Convert to fraction form
    32,840.32/45,334.56 = 20,920/x
  3. Step 3: Cross multiply
    32,840.32x = 45,334.56 × 20,920
  4. Step 4: Simplify right side
    32,840.32x = 948,398,995.20
  5. Step 5: Solve for x
    x = 948,398,995.20/32,840.32
  6. Step 6: Final answer
    x = 28,879.10

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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.