Home / 20,139,321.60-30,208,982.40-18,123,782.40

Finding the Fourth Proportional to 20,139,321.60, 30,208,982.40 and 18,123,782.40

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Solution

The fourth proportional to 20,139,321.60, 30,208,982.40 and 18,123,782.40 is: 27,185,673.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,139,321.60 : 30,208,982.40 = 18,123,782.40 : x
  2. Step 2: Convert to fraction form
    20,139,321.60/30,208,982.40 = 18,123,782.40/x
  3. Step 3: Cross multiply
    20,139,321.60x = 30,208,982.40 × 18,123,782.40
  4. Step 4: Simplify right side
    20,139,321.60x = 547,501,023,543,029.69
  5. Step 5: Solve for x
    x = 547,501,023,543,029.69/20,139,321.60
  6. Step 6: Final answer
    x = 27,185,673.60

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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.