Home / 31,379.85-47,077.75-8,890.51

Finding the Fourth Proportional to 31,379.85, 47,077.75 and 8,890.51

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Solution

The fourth proportional to 31,379.85, 47,077.75 and 8,890.51 is: 13,338.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,379.85 : 47,077.75 = 8,890.51 : x
  2. Step 2: Convert to fraction form
    31,379.85/47,077.75 = 8,890.51/x
  3. Step 3: Cross multiply
    31,379.85x = 47,077.75 × 8,890.51
  4. Step 4: Simplify right side
    31,379.85x = 418,545,012.30
  5. Step 5: Solve for x
    x = 418,545,012.30/31,379.85
  6. Step 6: Final answer
    x = 13,338.02

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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.