Home / 31,782.78-47,641.37-20,711.09

Finding the Fourth Proportional to 31,782.78, 47,641.37 and 20,711.09

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Solution

The fourth proportional to 31,782.78, 47,641.37 and 20,711.09 is: 31,045.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,782.78 : 47,641.37 = 20,711.09 : x
  2. Step 2: Convert to fraction form
    31,782.78/47,641.37 = 20,711.09/x
  3. Step 3: Cross multiply
    31,782.78x = 47,641.37 × 20,711.09
  4. Step 4: Simplify right side
    31,782.78x = 986,704,717.34
  5. Step 5: Solve for x
    x = 986,704,717.34/31,782.78
  6. Step 6: Final answer
    x = 31,045.26

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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.