Home / 7,172,420.45-9,897,947.82-3,909,237.84

Finding the Fourth Proportional to 7,172,420.45, 9,897,947.82 and 3,909,237.84

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Solution

The fourth proportional to 7,172,420.45, 9,897,947.82 and 3,909,237.84 is: 5,394,752.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,172,420.45 : 9,897,947.82 = 3,909,237.84 : x
  2. Step 2: Convert to fraction form
    7,172,420.45/9,897,947.82 = 3,909,237.84/x
  3. Step 3: Cross multiply
    7,172,420.45x = 9,897,947.82 × 3,909,237.84
  4. Step 4: Simplify right side
    7,172,420.45x = 38,693,432,156,289.51
  5. Step 5: Solve for x
    x = 38,693,432,156,289.51/7,172,420.45
  6. Step 6: Final answer
    x = 5,394,752.36

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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.