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Finding the Fourth Proportional to 18,703,664.82, 28,030,695.02 and 9,605,394.90

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Solution

The fourth proportional to 18,703,664.82, 28,030,695.02 and 9,605,394.90 is: 14,395,355.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,703,664.82 : 28,030,695.02 = 9,605,394.90 : x
  2. Step 2: Convert to fraction form
    18,703,664.82/28,030,695.02 = 9,605,394.90/x
  3. Step 3: Cross multiply
    18,703,664.82x = 28,030,695.02 × 9,605,394.90
  4. Step 4: Simplify right side
    18,703,664.82x = 269,245,894,988,563.41
  5. Step 5: Solve for x
    x = 269,245,894,988,563.41/18,703,664.82
  6. Step 6: Final answer
    x = 14,395,355.01

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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.