Home / 28,774.42-39,719.49-21,281.05

Finding the Fourth Proportional to 28,774.42, 39,719.49 and 21,281.05

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Solution

The fourth proportional to 28,774.42, 39,719.49 and 21,281.05 is: 29,375.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,774.42 : 39,719.49 = 21,281.05 : x
  2. Step 2: Convert to fraction form
    28,774.42/39,719.49 = 21,281.05/x
  3. Step 3: Cross multiply
    28,774.42x = 39,719.49 × 21,281.05
  4. Step 4: Simplify right side
    28,774.42x = 845,272,452.66
  5. Step 5: Solve for x
    x = 845,272,452.66/28,774.42
  6. Step 6: Final answer
    x = 29,375.83

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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.