Home / 20,394.90-28,145.02-11,442.42

Finding the Fourth Proportional to 20,394.90, 28,145.02 and 11,442.42

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Solution

The fourth proportional to 20,394.90, 28,145.02 and 11,442.42 is: 15,790.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,394.90 : 28,145.02 = 11,442.42 : x
  2. Step 2: Convert to fraction form
    20,394.90/28,145.02 = 11,442.42/x
  3. Step 3: Cross multiply
    20,394.90x = 28,145.02 × 11,442.42
  4. Step 4: Simplify right side
    20,394.90x = 322,047,139.75
  5. Step 5: Solve for x
    x = 322,047,139.75/20,394.90
  6. Step 6: Final answer
    x = 15,790.57

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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.