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Finding the Fourth Proportional to 9,431,143.50, 13,014,978.17 and 5,138,791.50

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Solution

The fourth proportional to 9,431,143.50, 13,014,978.17 and 5,138,791.50 is: 7,091,532.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,431,143.50 : 13,014,978.17 = 5,138,791.50 : x
  2. Step 2: Convert to fraction form
    9,431,143.50/13,014,978.17 = 5,138,791.50/x
  3. Step 3: Cross multiply
    9,431,143.50x = 13,014,978.17 × 5,138,791.50
  4. Step 4: Simplify right side
    9,431,143.50x = 66,881,259,192,681.55
  5. Step 5: Solve for x
    x = 66,881,259,192,681.55/9,431,143.50
  6. Step 6: Final answer
    x = 7,091,532.35

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.