Home / 31,860.54-47,771.82-12,140.64

Finding the Fourth Proportional to 31,860.54, 47,771.82 and 12,140.64

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Solution

The fourth proportional to 31,860.54, 47,771.82 and 12,140.64 is: 18,203.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,860.54 : 47,771.82 = 12,140.64 : x
  2. Step 2: Convert to fraction form
    31,860.54/47,771.82 = 12,140.64/x
  3. Step 3: Cross multiply
    31,860.54x = 47,771.82 × 12,140.64
  4. Step 4: Simplify right side
    31,860.54x = 579,980,468.76
  5. Step 5: Solve for x
    x = 579,980,468.76/31,860.54
  6. Step 6: Final answer
    x = 18,203.72

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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.