Home / 32,728.80-45,165.60-19,981.92

Finding the Fourth Proportional to 32,728.80, 45,165.60 and 19,981.92

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Solution

The fourth proportional to 32,728.80, 45,165.60 and 19,981.92 is: 27,574.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    32,728.80 : 45,165.60 = 19,981.92 : x
  2. Step 2: Convert to fraction form
    32,728.80/45,165.60 = 19,981.92/x
  3. Step 3: Cross multiply
    32,728.80x = 45,165.60 × 19,981.92
  4. Step 4: Simplify right side
    32,728.80x = 902,495,405.95
  5. Step 5: Solve for x
    x = 902,495,405.95/32,728.80
  6. Step 6: Final answer
    x = 27,574.96

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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.