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Finding the Fourth Proportional to 10,652,109.20, 15,978,163.80 and 8,880,639.20

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Solution

The fourth proportional to 10,652,109.20, 15,978,163.80 and 8,880,639.20 is: 13,320,958.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,652,109.20 : 15,978,163.80 = 8,880,639.20 : x
  2. Step 2: Convert to fraction form
    10,652,109.20/15,978,163.80 = 8,880,639.20/x
  3. Step 3: Cross multiply
    10,652,109.20x = 15,978,163.80 × 8,880,639.20
  4. Step 4: Simplify right side
    10,652,109.20x = 141,896,307,786,300.97
  5. Step 5: Solve for x
    x = 141,896,307,786,300.97/10,652,109.20
  6. Step 6: Final answer
    x = 13,320,958.80

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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.