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Finding the Fourth Proportional to 19,668.76, 29,487.72 and 13,413.22

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Solution

The fourth proportional to 19,668.76, 29,487.72 and 13,413.22 is: 20,109.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,668.76 : 29,487.72 = 13,413.22 : x
  2. Step 2: Convert to fraction form
    19,668.76/29,487.72 = 13,413.22/x
  3. Step 3: Cross multiply
    19,668.76x = 29,487.72 × 13,413.22
  4. Step 4: Simplify right side
    19,668.76x = 395,525,275.66
  5. Step 5: Solve for x
    x = 395,525,275.66/19,668.76
  6. Step 6: Final answer
    x = 20,109.31

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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.