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Finding the Fourth Proportional to 18,708,356.70, 28,058,598.45 and 7,926,009.30

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Solution

The fourth proportional to 18,708,356.70, 28,058,598.45 and 7,926,009.30 is: 11,887,346.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,708,356.70 : 28,058,598.45 = 7,926,009.30 : x
  2. Step 2: Convert to fraction form
    18,708,356.70/28,058,598.45 = 7,926,009.30/x
  3. Step 3: Cross multiply
    18,708,356.70x = 28,058,598.45 × 7,926,009.30
  4. Step 4: Simplify right side
    18,708,356.70x = 222,392,712,259,665.56
  5. Step 5: Solve for x
    x = 222,392,712,259,665.56/18,708,356.70
  6. Step 6: Final answer
    x = 11,887,346.16

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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.