Home / 20,407,147.56-28,161,864.15-11,239,790.31

Finding the Fourth Proportional to 20,407,147.56, 28,161,864.15 and 11,239,790.31

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Solution

The fourth proportional to 20,407,147.56, 28,161,864.15 and 11,239,790.31 is: 15,510,910.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,407,147.56 : 28,161,864.15 = 11,239,790.31 : x
  2. Step 2: Convert to fraction form
    20,407,147.56/28,161,864.15 = 11,239,790.31/x
  3. Step 3: Cross multiply
    20,407,147.56x = 28,161,864.15 × 11,239,790.31
  4. Step 4: Simplify right side
    20,407,147.56x = 316,533,447,742,557.19
  5. Step 5: Solve for x
    x = 316,533,447,742,557.19/20,407,147.56
  6. Step 6: Final answer
    x = 15,510,910.91

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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.