Home / 37,987.38-52,421.94-20,991.60

Finding the Fourth Proportional to 37,987.38, 52,421.94 and 20,991.60

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Solution

The fourth proportional to 37,987.38, 52,421.94 and 20,991.60 is: 28,968.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    37,987.38 : 52,421.94 = 20,991.60 : x
  2. Step 2: Convert to fraction form
    37,987.38/52,421.94 = 20,991.60/x
  3. Step 3: Cross multiply
    37,987.38x = 52,421.94 × 20,991.60
  4. Step 4: Simplify right side
    37,987.38x = 1,100,420,395.70
  5. Step 5: Solve for x
    x = 1,100,420,395.70/37,987.38
  6. Step 6: Final answer
    x = 28,968.05

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Double scale
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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.