Home / 39,630.21-54,693.14-21,728.63

Finding the Fourth Proportional to 39,630.21, 54,693.14 and 21,728.63

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Solution

The fourth proportional to 39,630.21, 54,693.14 and 21,728.63 is: 29,987.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,630.21 : 54,693.14 = 21,728.63 : x
  2. Step 2: Convert to fraction form
    39,630.21/54,693.14 = 21,728.63/x
  3. Step 3: Cross multiply
    39,630.21x = 54,693.14 × 21,728.63
  4. Step 4: Simplify right side
    39,630.21x = 1,188,406,620.49
  5. Step 5: Solve for x
    x = 1,188,406,620.49/39,630.21
  6. Step 6: Final answer
    x = 29,987.39

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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.