Home / 20,805,420.40-31,166,140.20-11,819,474.80

Finding the Fourth Proportional to 20,805,420.40, 31,166,140.20 and 11,819,474.80

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Solution

The fourth proportional to 20,805,420.40, 31,166,140.20 and 11,819,474.80 is: 17,705,357.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,805,420.40 : 31,166,140.20 = 11,819,474.80 : x
  2. Step 2: Convert to fraction form
    20,805,420.40/31,166,140.20 = 11,819,474.80/x
  3. Step 3: Cross multiply
    20,805,420.40x = 31,166,140.20 × 11,819,474.80
  4. Step 4: Simplify right side
    20,805,420.40x = 368,367,408,707,167
  5. Step 5: Solve for x
    x = 368,367,408,707,167/20,805,420.40
  6. Step 6: Final answer
    x = 17,705,357.62

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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.