Home / 31,784.78-47,644.36-20,713.10

Finding the Fourth Proportional to 31,784.78, 47,644.36 and 20,713.10

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Solution

The fourth proportional to 31,784.78, 47,644.36 and 20,713.10 is: 31,048.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,784.78 : 47,644.36 = 20,713.10 : x
  2. Step 2: Convert to fraction form
    31,784.78/47,644.36 = 20,713.10/x
  3. Step 3: Cross multiply
    31,784.78x = 47,644.36 × 20,713.10
  4. Step 4: Simplify right side
    31,784.78x = 986,862,393.12
  5. Step 5: Solve for x
    x = 986,862,393.12/31,784.78
  6. Step 6: Final answer
    x = 31,048.27

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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.