Home / 18,687,623.20-28,025,905.20-7,321,530.40

Finding the Fourth Proportional to 18,687,623.20, 28,025,905.20 and 7,321,530.40

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Solution

The fourth proportional to 18,687,623.20, 28,025,905.20 and 7,321,530.40 is: 10,980,129.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,687,623.20 : 28,025,905.20 = 7,321,530.40 : x
  2. Step 2: Convert to fraction form
    18,687,623.20/28,025,905.20 = 7,321,530.40/x
  3. Step 3: Cross multiply
    18,687,623.20x = 28,025,905.20 × 7,321,530.40
  4. Step 4: Simplify right side
    18,687,623.20x = 205,192,516,909,318.09
  5. Step 5: Solve for x
    x = 205,192,516,909,318.09/18,687,623.20
  6. Step 6: Final answer
    x = 10,980,129.19

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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.