Home / 20,864.31-28,792.86-11,433.21

Finding the Fourth Proportional to 20,864.31, 28,792.86 and 11,433.21

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Solution

The fourth proportional to 20,864.31, 28,792.86 and 11,433.21 is: 15,777.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,864.31 : 28,792.86 = 11,433.21 : x
  2. Step 2: Convert to fraction form
    20,864.31/28,792.86 = 11,433.21/x
  3. Step 3: Cross multiply
    20,864.31x = 28,792.86 × 11,433.21
  4. Step 4: Simplify right side
    20,864.31x = 329,194,814.88
  5. Step 5: Solve for x
    x = 329,194,814.88/20,864.31
  6. Step 6: Final answer
    x = 15,777.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.