Home / 20,864.42-31,254.94-12,539.93

Finding the Fourth Proportional to 20,864.42, 31,254.94 and 12,539.93

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Solution

The fourth proportional to 20,864.42, 31,254.94 and 12,539.93 is: 18,784.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,864.42 : 31,254.94 = 12,539.93 : x
  2. Step 2: Convert to fraction form
    20,864.42/31,254.94 = 12,539.93/x
  3. Step 3: Cross multiply
    20,864.42x = 31,254.94 × 12,539.93
  4. Step 4: Simplify right side
    20,864.42x = 391,934,759.75
  5. Step 5: Solve for x
    x = 391,934,759.75/20,864.42
  6. Step 6: Final answer
    x = 18,784.84

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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.