Home / 20,937.42-28,893.71-11,505.78

Finding the Fourth Proportional to 20,937.42, 28,893.71 and 11,505.78

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Solution

The fourth proportional to 20,937.42, 28,893.71 and 11,505.78 is: 15,878.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,937.42 : 28,893.71 = 11,505.78 : x
  2. Step 2: Convert to fraction form
    20,937.42/28,893.71 = 11,505.78/x
  3. Step 3: Cross multiply
    20,937.42x = 28,893.71 × 11,505.78
  4. Step 4: Simplify right side
    20,937.42x = 332,444,699.41
  5. Step 5: Solve for x
    x = 332,444,699.41/20,937.42
  6. Step 6: Final answer
    x = 15,878.02

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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.