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Finding the Fourth Proportional to 39,885.80, 59,797.02 and 20,172.20

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Solution

The fourth proportional to 39,885.80, 59,797.02 and 20,172.20 is: 30,242.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,885.80 : 59,797.02 = 20,172.20 : x
  2. Step 2: Convert to fraction form
    39,885.80/59,797.02 = 20,172.20/x
  3. Step 3: Cross multiply
    39,885.80x = 59,797.02 × 20,172.20
  4. Step 4: Simplify right side
    39,885.80x = 1,206,237,446.84
  5. Step 5: Solve for x
    x = 1,206,237,446.84/39,885.80
  6. Step 6: Final answer
    x = 30,242.28

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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.