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Finding the Fourth Proportional to 18,809,929.80, 28,214,894.70 and 9,243,991.80

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Solution

The fourth proportional to 18,809,929.80, 28,214,894.70 and 9,243,991.80 is: 13,865,987.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,809,929.80 : 28,214,894.70 = 9,243,991.80 : x
  2. Step 2: Convert to fraction form
    18,809,929.80/28,214,894.70 = 9,243,991.80/x
  3. Step 3: Cross multiply
    18,809,929.80x = 28,214,894.70 × 9,243,991.80
  4. Step 4: Simplify right side
    18,809,929.80x = 260,818,255,244,663.47
  5. Step 5: Solve for x
    x = 260,818,255,244,663.47/18,809,929.80
  6. Step 6: Final answer
    x = 13,865,987.70

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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.