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Finding the Fourth Proportional to 20,522,693.20, 30,763,735.80 and 9,721,008.40

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Solution

The fourth proportional to 20,522,693.20, 30,763,735.80 and 9,721,008.40 is: 14,571,895.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,522,693.20 : 30,763,735.80 = 9,721,008.40 : x
  2. Step 2: Convert to fraction form
    20,522,693.20/30,763,735.80 = 9,721,008.40/x
  3. Step 3: Cross multiply
    20,522,693.20x = 30,763,735.80 × 9,721,008.40
  4. Step 4: Simplify right side
    20,522,693.20x = 299,054,534,127,180.75
  5. Step 5: Solve for x
    x = 299,054,534,127,180.75/20,522,693.20
  6. Step 6: Final answer
    x = 14,571,895.18

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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.