Home / 21,213.18-31,818.78-8,730.09

Finding the Fourth Proportional to 21,213.18, 31,818.78 and 8,730.09

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Solution

The fourth proportional to 21,213.18, 31,818.78 and 8,730.09 is: 13,094.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,213.18 : 31,818.78 = 8,730.09 : x
  2. Step 2: Convert to fraction form
    21,213.18/31,818.78 = 8,730.09/x
  3. Step 3: Cross multiply
    21,213.18x = 31,818.78 × 8,730.09
  4. Step 4: Simplify right side
    21,213.18x = 277,780,813.09
  5. Step 5: Solve for x
    x = 277,780,813.09/21,213.18
  6. Step 6: Final answer
    x = 13,094.73

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1.5x scale

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.