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Finding the Fourth Proportional to 37,665.89, 51,978.78 and 20,670.42

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Solution

The fourth proportional to 37,665.89, 51,978.78 and 20,670.42 is: 28,525.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    37,665.89 : 51,978.78 = 20,670.42 : x
  2. Step 2: Convert to fraction form
    37,665.89/51,978.78 = 20,670.42/x
  3. Step 3: Cross multiply
    37,665.89x = 51,978.78 × 20,670.42
  4. Step 4: Simplify right side
    37,665.89x = 1,074,423,213.69
  5. Step 5: Solve for x
    x = 1,074,423,213.69/37,665.89
  6. Step 6: Final answer
    x = 28,525.10

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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.