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Finding the Fourth Proportional to 39,970.80, 60,004.80 and 20,239.20

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Solution

The fourth proportional to 39,970.80, 60,004.80 and 20,239.20 is: 30,383.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,970.80 : 60,004.80 = 20,239.20 : x
  2. Step 2: Convert to fraction form
    39,970.80/60,004.80 = 20,239.20/x
  3. Step 3: Cross multiply
    39,970.80x = 60,004.80 × 20,239.20
  4. Step 4: Simplify right side
    39,970.80x = 1,214,449,148.16
  5. Step 5: Solve for x
    x = 1,214,449,148.16/39,970.80
  6. Step 6: Final answer
    x = 30,383.41

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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.