Home / 20,306,921.97-28,021,886.60-11,139,564.72

Finding the Fourth Proportional to 20,306,921.97, 28,021,886.60 and 11,139,564.72

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Solution

The fourth proportional to 20,306,921.97, 28,021,886.60 and 11,139,564.72 is: 15,371,685.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,306,921.97 : 28,021,886.60 = 11,139,564.72 : x
  2. Step 2: Convert to fraction form
    20,306,921.97/28,021,886.60 = 11,139,564.72/x
  3. Step 3: Cross multiply
    20,306,921.97x = 28,021,886.60 × 11,139,564.72
  4. Step 4: Simplify right side
    20,306,921.97x = 312,151,619,357,200.81
  5. Step 5: Solve for x
    x = 312,151,619,357,200.81/20,306,921.97
  6. Step 6: Final answer
    x = 15,371,685.57

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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.