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Finding the Fourth Proportional to 4,791.69, 7,220.12 and 3,987.95

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Solution

The fourth proportional to 4,791.69, 7,220.12 and 3,987.95 is: 6,009.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,791.69 : 7,220.12 = 3,987.95 : x
  2. Step 2: Convert to fraction form
    4,791.69/7,220.12 = 3,987.95/x
  3. Step 3: Cross multiply
    4,791.69x = 7,220.12 × 3,987.95
  4. Step 4: Simplify right side
    4,791.69x = 28,793,421.51
  5. Step 5: Solve for x
    x = 28,793,421.51/4,791.69
  6. Step 6: Final answer
    x = 6,009.03

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.