Home / 40,830.54-61,218.78-19,728.78

Finding the Fourth Proportional to 40,830.54, 61,218.78 and 19,728.78

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Solution

The fourth proportional to 40,830.54, 61,218.78 and 19,728.78 is: 29,580.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,830.54 : 61,218.78 = 19,728.78 : x
  2. Step 2: Convert to fraction form
    40,830.54/61,218.78 = 19,728.78/x
  3. Step 3: Cross multiply
    40,830.54x = 61,218.78 × 19,728.78
  4. Step 4: Simplify right side
    40,830.54x = 1,207,771,842.49
  5. Step 5: Solve for x
    x = 1,207,771,842.49/40,830.54
  6. Step 6: Final answer
    x = 29,580.11

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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.