Home / 31,869.40-47,783.04-12,135.64

Finding the Fourth Proportional to 31,869.40, 47,783.04 and 12,135.64

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Solution

The fourth proportional to 31,869.40, 47,783.04 and 12,135.64 is: 18,195.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,869.40 : 47,783.04 = 12,135.64 : x
  2. Step 2: Convert to fraction form
    31,869.40/47,783.04 = 12,135.64/x
  3. Step 3: Cross multiply
    31,869.40x = 47,783.04 × 12,135.64
  4. Step 4: Simplify right side
    31,869.40x = 579,877,771.55
  5. Step 5: Solve for x
    x = 579,877,771.55/31,869.40
  6. Step 6: Final answer
    x = 18,195.44

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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.