Home / 39,820.85-54,951.77-21,670.80

Finding the Fourth Proportional to 39,820.85, 54,951.77 and 21,670.80

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Solution

The fourth proportional to 39,820.85, 54,951.77 and 21,670.80 is: 29,905.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,820.85 : 54,951.77 = 21,670.80 : x
  2. Step 2: Convert to fraction form
    39,820.85/54,951.77 = 21,670.80/x
  3. Step 3: Cross multiply
    39,820.85x = 54,951.77 × 21,670.80
  4. Step 4: Simplify right side
    39,820.85x = 1,190,848,915.03
  5. Step 5: Solve for x
    x = 1,190,848,915.03/39,820.85
  6. Step 6: Final answer
    x = 29,905.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.