Home / 20,720,927.80-31,081,391.70-13,162,655.80

Finding the Fourth Proportional to 20,720,927.80, 31,081,391.70 and 13,162,655.80

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Solution

The fourth proportional to 20,720,927.80, 31,081,391.70 and 13,162,655.80 is: 19,743,983.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,720,927.80 : 31,081,391.70 = 13,162,655.80 : x
  2. Step 2: Convert to fraction form
    20,720,927.80/31,081,391.70 = 13,162,655.80/x
  3. Step 3: Cross multiply
    20,720,927.80x = 31,081,391.70 × 13,162,655.80
  4. Step 4: Simplify right side
    20,720,927.80x = 409,113,660,732,076.88
  5. Step 5: Solve for x
    x = 409,113,660,732,076.88/20,720,927.80
  6. Step 6: Final answer
    x = 19,743,983.70

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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.