Home / 20,929,576.89-31,398,556.01-11,720,645.42

Finding the Fourth Proportional to 20,929,576.89, 31,398,556.01 and 11,720,645.42

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Solution

The fourth proportional to 20,929,576.89, 31,398,556.01 and 11,720,645.42 is: 17,583,314.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,929,576.89 : 31,398,556.01 = 11,720,645.42 : x
  2. Step 2: Convert to fraction form
    20,929,576.89/31,398,556.01 = 11,720,645.42/x
  3. Step 3: Cross multiply
    20,929,576.89x = 31,398,556.01 × 11,720,645.42
  4. Step 4: Simplify right side
    20,929,576.89x = 368,011,341,477,623.94
  5. Step 5: Solve for x
    x = 368,011,341,477,623.94/20,929,576.89
  6. Step 6: Final answer
    x = 17,583,314.91

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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.