Home / 31,987.69-47,967.60-16,991.53

Finding the Fourth Proportional to 31,987.69, 47,967.60 and 16,991.53

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Solution

The fourth proportional to 31,987.69, 47,967.60 and 16,991.53 is: 25,479.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,987.69 : 47,967.60 = 16,991.53 : x
  2. Step 2: Convert to fraction form
    31,987.69/47,967.60 = 16,991.53/x
  3. Step 3: Cross multiply
    31,987.69x = 47,967.60 × 16,991.53
  4. Step 4: Simplify right side
    31,987.69x = 815,042,762.65
  5. Step 5: Solve for x
    x = 815,042,762.65/31,987.69
  6. Step 6: Final answer
    x = 25,479.89

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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.