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Finding the Fourth Proportional to 15,248,994.94, 21,043,978.62 and 8,279,966.20

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Solution

The fourth proportional to 15,248,994.94, 21,043,978.62 and 8,279,966.20 is: 11,426,551.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,248,994.94 : 21,043,978.62 = 8,279,966.20 : x
  2. Step 2: Convert to fraction form
    15,248,994.94/21,043,978.62 = 8,279,966.20/x
  3. Step 3: Cross multiply
    15,248,994.94x = 21,043,978.62 × 8,279,966.20
  4. Step 4: Simplify right side
    15,248,994.94x = 174,243,431,687,122.66
  5. Step 5: Solve for x
    x = 174,243,431,687,122.66/15,248,994.94
  6. Step 6: Final answer
    x = 11,426,551.87

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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.