Home / 31,851.10-47,776.65-12,138.78

Finding the Fourth Proportional to 31,851.10, 47,776.65 and 12,138.78

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Solution

The fourth proportional to 31,851.10, 47,776.65 and 12,138.78 is: 18,208.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,851.10 : 47,776.65 = 12,138.78 : x
  2. Step 2: Convert to fraction form
    31,851.10/47,776.65 = 12,138.78/x
  3. Step 3: Cross multiply
    31,851.10x = 47,776.65 × 12,138.78
  4. Step 4: Simplify right side
    31,851.10x = 579,950,243.49
  5. Step 5: Solve for x
    x = 579,950,243.49/31,851.10
  6. Step 6: Final answer
    x = 18,208.17

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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.