Home / 31,945.10-47,926.90-13,221.68

Finding the Fourth Proportional to 31,945.10, 47,926.90 and 13,221.68

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Solution

The fourth proportional to 31,945.10, 47,926.90 and 13,221.68 is: 19,836.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,945.10 : 47,926.90 = 13,221.68 : x
  2. Step 2: Convert to fraction form
    31,945.10/47,926.90 = 13,221.68/x
  3. Step 3: Cross multiply
    31,945.10x = 47,926.90 × 13,221.68
  4. Step 4: Simplify right side
    31,945.10x = 633,674,135.19
  5. Step 5: Solve for x
    x = 633,674,135.19/31,945.10
  6. Step 6: Final answer
    x = 19,836.35

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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.