Home / 31,880.47-47,813.88-13,155.65

Finding the Fourth Proportional to 31,880.47, 47,813.88 and 13,155.65

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Solution

The fourth proportional to 31,880.47, 47,813.88 and 13,155.65 is: 19,730.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,880.47 : 47,813.88 = 13,155.65 : x
  2. Step 2: Convert to fraction form
    31,880.47/47,813.88 = 13,155.65/x
  3. Step 3: Cross multiply
    31,880.47x = 47,813.88 × 13,155.65
  4. Step 4: Simplify right side
    31,880.47x = 629,022,670.42
  5. Step 5: Solve for x
    x = 629,022,670.42/31,880.47
  6. Step 6: Final answer
    x = 19,730.66

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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.