Home / 20,306,900.78-28,021,857.36-11,139,543.54

Finding the Fourth Proportional to 20,306,900.78, 28,021,857.36 and 11,139,543.54

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Solution

The fourth proportional to 20,306,900.78, 28,021,857.36 and 11,139,543.54 is: 15,371,656.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,306,900.78 : 28,021,857.36 = 11,139,543.54 : x
  2. Step 2: Convert to fraction form
    20,306,900.78/28,021,857.36 = 11,139,543.54/x
  3. Step 3: Cross multiply
    20,306,900.78x = 28,021,857.36 × 11,139,543.54
  4. Step 4: Simplify right side
    20,306,900.78x = 312,150,700,133,389.44
  5. Step 5: Solve for x
    x = 312,150,700,133,389.44/20,306,900.78
  6. Step 6: Final answer
    x = 15,371,656.34

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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.