Home / 31,855.78-47,784.18-12,135.46

Finding the Fourth Proportional to 31,855.78, 47,784.18 and 12,135.46

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Solution

The fourth proportional to 31,855.78, 47,784.18 and 12,135.46 is: 18,203.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,855.78 : 47,784.18 = 12,135.46 : x
  2. Step 2: Convert to fraction form
    31,855.78/47,784.18 = 12,135.46/x
  3. Step 3: Cross multiply
    31,855.78x = 47,784.18 × 12,135.46
  4. Step 4: Simplify right side
    31,855.78x = 579,883,005.02
  5. Step 5: Solve for x
    x = 579,883,005.02/31,855.78
  6. Step 6: Final answer
    x = 18,203.38

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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.