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Finding the Fourth Proportional to 39,907.40, 59,846.70 and 20,179.40

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Solution

The fourth proportional to 39,907.40, 59,846.70 and 20,179.40 is: 30,261.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,907.40 : 59,846.70 = 20,179.40 : x
  2. Step 2: Convert to fraction form
    39,907.40/59,846.70 = 20,179.40/x
  3. Step 3: Cross multiply
    39,907.40x = 59,846.70 × 20,179.40
  4. Step 4: Simplify right side
    39,907.40x = 1,207,670,497.98
  5. Step 5: Solve for x
    x = 1,207,670,497.98/39,907.40
  6. Step 6: Final answer
    x = 30,261.82

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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.