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Finding the Fourth Proportional to 40,383.80, 60,551.40 and 20,700.80

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Solution

The fourth proportional to 40,383.80, 60,551.40 and 20,700.80 is: 31,038.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,383.80 : 60,551.40 = 20,700.80 : x
  2. Step 2: Convert to fraction form
    40,383.80/60,551.40 = 20,700.80/x
  3. Step 3: Cross multiply
    40,383.80x = 60,551.40 × 20,700.80
  4. Step 4: Simplify right side
    40,383.80x = 1,253,462,421.12
  5. Step 5: Solve for x
    x = 1,253,462,421.12/40,383.80
  6. Step 6: Final answer
    x = 31,038.74

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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.