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Finding the Fourth Proportional to 7,190,969.18, 9,923,478.50 and 3,927,786

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Solution

The fourth proportional to 7,190,969.18, 9,923,478.50 and 3,927,786 is: 5,420,312.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,190,969.18 : 9,923,478.50 = 3,927,786 : x
  2. Step 2: Convert to fraction form
    7,190,969.18/9,923,478.50 = 3,927,786/x
  3. Step 3: Cross multiply
    7,190,969.18x = 9,923,478.50 × 3,927,786
  4. Step 4: Simplify right side
    7,190,969.18x = 38,977,299,923,601
  5. Step 5: Solve for x
    x = 38,977,299,923,601/7,190,969.18
  6. Step 6: Final answer
    x = 5,420,312.47

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.