Home / 31,880.21-47,821.91-12,160.31

Finding the Fourth Proportional to 31,880.21, 47,821.91 and 12,160.31

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Solution

The fourth proportional to 31,880.21, 47,821.91 and 12,160.31 is: 18,241.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,880.21 : 47,821.91 = 12,160.31 : x
  2. Step 2: Convert to fraction form
    31,880.21/47,821.91 = 12,160.31/x
  3. Step 3: Cross multiply
    31,880.21x = 47,821.91 × 12,160.31
  4. Step 4: Simplify right side
    31,880.21x = 581,528,950.48
  5. Step 5: Solve for x
    x = 581,528,950.48/31,880.21
  6. Step 6: Final answer
    x = 18,241.07

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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.