Home / 31,835.28-47,703.07-20,123.90

Finding the Fourth Proportional to 31,835.28, 47,703.07 and 20,123.90

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Solution

The fourth proportional to 31,835.28, 47,703.07 and 20,123.90 is: 30,154.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,835.28 : 47,703.07 = 20,123.90 : x
  2. Step 2: Convert to fraction form
    31,835.28/47,703.07 = 20,123.90/x
  3. Step 3: Cross multiply
    31,835.28x = 47,703.07 × 20,123.90
  4. Step 4: Simplify right side
    31,835.28x = 959,971,810.37
  5. Step 5: Solve for x
    x = 959,971,810.37/31,835.28
  6. Step 6: Final answer
    x = 30,154.34

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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.