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Finding the Fourth Proportional to 39,907.80, 59,853.30 and 20,167.80

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Solution

The fourth proportional to 39,907.80, 59,853.30 and 20,167.80 is: 30,247.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,907.80 : 59,853.30 = 20,167.80 : x
  2. Step 2: Convert to fraction form
    39,907.80/59,853.30 = 20,167.80/x
  3. Step 3: Cross multiply
    39,907.80x = 59,853.30 × 20,167.80
  4. Step 4: Simplify right side
    39,907.80x = 1,207,109,383.74
  5. Step 5: Solve for x
    x = 1,207,109,383.74/39,907.80
  6. Step 6: Final answer
    x = 30,247.45

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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.