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Finding the Fourth Proportional to 39,378.80, 59,047.80 and 11,673.20

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Solution

The fourth proportional to 39,378.80, 59,047.80 and 11,673.20 is: 17,503.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,378.80 : 59,047.80 = 11,673.20 : x
  2. Step 2: Convert to fraction form
    39,378.80/59,047.80 = 11,673.20/x
  3. Step 3: Cross multiply
    39,378.80x = 59,047.80 × 11,673.20
  4. Step 4: Simplify right side
    39,378.80x = 689,276,778.96
  5. Step 5: Solve for x
    x = 689,276,778.96/39,378.80
  6. Step 6: Final answer
    x = 17,503.75

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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.