Home / 19,839.21-29,759.43-9,978.89

Finding the Fourth Proportional to 19,839.21, 29,759.43 and 9,978.89

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Solution

The fourth proportional to 19,839.21, 29,759.43 and 9,978.89 is: 14,968.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,839.21 : 29,759.43 = 9,978.89 : x
  2. Step 2: Convert to fraction form
    19,839.21/29,759.43 = 9,978.89/x
  3. Step 3: Cross multiply
    19,839.21x = 29,759.43 × 9,978.89
  4. Step 4: Simplify right side
    19,839.21x = 296,965,929.64
  5. Step 5: Solve for x
    x = 296,965,929.64/19,839.21
  6. Step 6: Final answer
    x = 14,968.64

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1.5x scale

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.