Home / 20,869.53-28,799.78-11,438.07

Finding the Fourth Proportional to 20,869.53, 28,799.78 and 11,438.07

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Solution

The fourth proportional to 20,869.53, 28,799.78 and 11,438.07 is: 15,784.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,869.53 : 28,799.78 = 11,438.07 : x
  2. Step 2: Convert to fraction form
    20,869.53/28,799.78 = 11,438.07/x
  3. Step 3: Cross multiply
    20,869.53x = 28,799.78 × 11,438.07
  4. Step 4: Simplify right side
    20,869.53x = 329,413,899.62
  5. Step 5: Solve for x
    x = 329,413,899.62/20,869.53
  6. Step 6: Final answer
    x = 15,784.44

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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.