Home / 21,214.18-31,820.28-8,731.09

Finding the Fourth Proportional to 21,214.18, 31,820.28 and 8,731.09

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Solution

The fourth proportional to 21,214.18, 31,820.28 and 8,731.09 is: 13,096.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,214.18 : 31,820.28 = 8,731.09 : x
  2. Step 2: Convert to fraction form
    21,214.18/31,820.28 = 8,731.09/x
  3. Step 3: Cross multiply
    21,214.18x = 31,820.28 × 8,731.09
  4. Step 4: Simplify right side
    21,214.18x = 277,825,728.51
  5. Step 5: Solve for x
    x = 277,825,728.51/21,214.18
  6. Step 6: Final answer
    x = 13,096.23

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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.