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Finding the Fourth Proportional to 39,781.58, 59,672.50 and 13,504.90

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Solution

The fourth proportional to 39,781.58, 59,672.50 and 13,504.90 is: 20,257.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,781.58 : 59,672.50 = 13,504.90 : x
  2. Step 2: Convert to fraction form
    39,781.58/59,672.50 = 13,504.90/x
  3. Step 3: Cross multiply
    39,781.58x = 59,672.50 × 13,504.90
  4. Step 4: Simplify right side
    39,781.58x = 805,871,145.25
  5. Step 5: Solve for x
    x = 805,871,145.25/39,781.58
  6. Step 6: Final answer
    x = 20,257.39

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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.