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Finding the Fourth Proportional to 39,148.40, 58,679.40 and 21,630.80

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Solution

The fourth proportional to 39,148.40, 58,679.40 and 21,630.80 is: 32,422.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,148.40 : 58,679.40 = 21,630.80 : x
  2. Step 2: Convert to fraction form
    39,148.40/58,679.40 = 21,630.80/x
  3. Step 3: Cross multiply
    39,148.40x = 58,679.40 × 21,630.80
  4. Step 4: Simplify right side
    39,148.40x = 1,269,282,365.52
  5. Step 5: Solve for x
    x = 1,269,282,365.52/39,148.40
  6. Step 6: Final answer
    x = 32,422.33

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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.