Home / 20,800,143.90-31,174,661.16-11,683,076.72

Finding the Fourth Proportional to 20,800,143.90, 31,174,661.16 and 11,683,076.72

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Solution

The fourth proportional to 20,800,143.90, 31,174,661.16 and 11,683,076.72 is: 17,510,261.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,800,143.90 : 31,174,661.16 = 11,683,076.72 : x
  2. Step 2: Convert to fraction form
    20,800,143.90/31,174,661.16 = 11,683,076.72/x
  3. Step 3: Cross multiply
    20,800,143.90x = 31,174,661.16 × 11,683,076.72
  4. Step 4: Simplify right side
    20,800,143.90x = 364,215,957,896,410.88
  5. Step 5: Solve for x
    x = 364,215,957,896,410.88/20,800,143.90
  6. Step 6: Final answer
    x = 17,510,261.45

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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.