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Finding the Fourth Proportional to 21,141,794, 31,712,691 and 5,185,442

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Solution

The fourth proportional to 21,141,794, 31,712,691 and 5,185,442 is: 7,778,163

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,141,794 : 31,712,691 = 5,185,442 : x
  2. Step 2: Convert to fraction form
    21,141,794/31,712,691 = 5,185,442/x
  3. Step 3: Cross multiply
    21,141,794x = 31,712,691 × 5,185,442
  4. Step 4: Simplify right side
    21,141,794x = 164,444,319,844,422
  5. Step 5: Solve for x
    x = 164,444,319,844,422/21,141,794
  6. Step 6: Final answer
    x = 7,778,163

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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.