Home / 20,306,921.47-28,021,885.91-11,139,564.22

Finding the Fourth Proportional to 20,306,921.47, 28,021,885.91 and 11,139,564.22

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Solution

The fourth proportional to 20,306,921.47, 28,021,885.91 and 11,139,564.22 is: 15,371,684.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,306,921.47 : 28,021,885.91 = 11,139,564.22 : x
  2. Step 2: Convert to fraction form
    20,306,921.47/28,021,885.91 = 11,139,564.22/x
  3. Step 3: Cross multiply
    20,306,921.47x = 28,021,885.91 × 11,139,564.22
  4. Step 4: Simplify right side
    20,306,921.47x = 312,151,597,575,978.94
  5. Step 5: Solve for x
    x = 312,151,597,575,978.94/20,306,921.47
  6. Step 6: Final answer
    x = 15,371,684.87

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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.