Home / 31,586.29-47,379.48-8,212.75

Finding the Fourth Proportional to 31,586.29, 47,379.48 and 8,212.75

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Solution

The fourth proportional to 31,586.29, 47,379.48 and 8,212.75 is: 12,319.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,586.29 : 47,379.48 = 8,212.75 : x
  2. Step 2: Convert to fraction form
    31,586.29/47,379.48 = 8,212.75/x
  3. Step 3: Cross multiply
    31,586.29x = 47,379.48 × 8,212.75
  4. Step 4: Simplify right side
    31,586.29x = 389,115,824.37
  5. Step 5: Solve for x
    x = 389,115,824.37/31,586.29
  6. Step 6: Final answer
    x = 12,319.14

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1.5x scale

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.