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Finding the Fourth Proportional to 13,608,657.30, 20,412,986.10 and 9,357,129.30

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Solution

The fourth proportional to 13,608,657.30, 20,412,986.10 and 9,357,129.30 is: 14,035,694.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,608,657.30 : 20,412,986.10 = 9,357,129.30 : x
  2. Step 2: Convert to fraction form
    13,608,657.30/20,412,986.10 = 9,357,129.30/x
  3. Step 3: Cross multiply
    13,608,657.30x = 20,412,986.10 × 9,357,129.30
  4. Step 4: Simplify right side
    13,608,657.30x = 191,006,950,336,802.75
  5. Step 5: Solve for x
    x = 191,006,950,336,802.75/13,608,657.30
  6. Step 6: Final answer
    x = 14,035,694.05

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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.