Home / 39,971.61-59,964.72-19,991.55

Finding the Fourth Proportional to 39,971.61, 59,964.72 and 19,991.55

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Solution

The fourth proportional to 39,971.61, 59,964.72 and 19,991.55 is: 29,990.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,971.61 : 59,964.72 = 19,991.55 : x
  2. Step 2: Convert to fraction form
    39,971.61/59,964.72 = 19,991.55/x
  3. Step 3: Cross multiply
    39,971.61x = 59,964.72 × 19,991.55
  4. Step 4: Simplify right side
    39,971.61x = 1,198,787,698.12
  5. Step 5: Solve for x
    x = 1,198,787,698.12/39,971.61
  6. Step 6: Final answer
    x = 29,990.98

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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.