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Finding the Fourth Proportional to 37,991.12, 52,425 and 20,995.16

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Solution

The fourth proportional to 37,991.12, 52,425 and 20,995.16 is: 28,971.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    37,991.12 : 52,425 = 20,995.16 : x
  2. Step 2: Convert to fraction form
    37,991.12/52,425 = 20,995.16/x
  3. Step 3: Cross multiply
    37,991.12x = 52,425 × 20,995.16
  4. Step 4: Simplify right side
    37,991.12x = 1,100,671,263
  5. Step 5: Solve for x
    x = 1,100,671,263/37,991.12
  6. Step 6: Final answer
    x = 28,971.80

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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.