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Finding the Fourth Proportional to 39,284.80, 58,840.80 and 38,420.80

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Solution

The fourth proportional to 39,284.80, 58,840.80 and 38,420.80 is: 57,546.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,284.80 : 58,840.80 = 38,420.80 : x
  2. Step 2: Convert to fraction form
    39,284.80/58,840.80 = 38,420.80/x
  3. Step 3: Cross multiply
    39,284.80x = 58,840.80 × 38,420.80
  4. Step 4: Simplify right side
    39,284.80x = 2,260,710,608.64
  5. Step 5: Solve for x
    x = 2,260,710,608.64/39,284.80
  6. Step 6: Final answer
    x = 57,546.70

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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.