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Finding the Fourth Proportional to 18,703,669.82, 28,030,702.50 and 9,605,399.90

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Solution

The fourth proportional to 18,703,669.82, 28,030,702.50 and 9,605,399.90 is: 14,395,362.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,703,669.82 : 28,030,702.50 = 9,605,399.90 : x
  2. Step 2: Convert to fraction form
    18,703,669.82/28,030,702.50 = 9,605,399.90/x
  3. Step 3: Cross multiply
    18,703,669.82x = 28,030,702.50 × 9,605,399.90
  4. Step 4: Simplify right side
    18,703,669.82x = 269,246,106,990,429.75
  5. Step 5: Solve for x
    x = 269,246,106,990,429.75/18,703,669.82
  6. Step 6: Final answer
    x = 14,395,362.49

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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.