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Finding the Fourth Proportional to 18,723,007.20, 28,084,510.80 and 9,133,449.60

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Solution

The fourth proportional to 18,723,007.20, 28,084,510.80 and 9,133,449.60 is: 13,700,174.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,723,007.20 : 28,084,510.80 = 9,133,449.60 : x
  2. Step 2: Convert to fraction form
    18,723,007.20/28,084,510.80 = 9,133,449.60/x
  3. Step 3: Cross multiply
    18,723,007.20x = 28,084,510.80 × 9,133,449.60
  4. Step 4: Simplify right side
    18,723,007.20x = 256,508,463,932,455.69
  5. Step 5: Solve for x
    x = 256,508,463,932,455.69/18,723,007.20
  6. Step 6: Final answer
    x = 13,700,174.40

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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.