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Finding the Fourth Proportional to 40,980, 61,484.58 and 20,218.08

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Solution

The fourth proportional to 40,980, 61,484.58 and 20,218.08 is: 30,334.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,980 : 61,484.58 = 20,218.08 : x
  2. Step 2: Convert to fraction form
    40,980/61,484.58 = 20,218.08/x
  3. Step 3: Cross multiply
    40,980x = 61,484.58 × 20,218.08
  4. Step 4: Simplify right side
    40,980x = 1,243,100,157.21
  5. Step 5: Solve for x
    x = 1,243,100,157.21/40,980
  6. Step 6: Final answer
    x = 30,334.31

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.