Home / 27,835.60-38,418-21,143.38

Finding the Fourth Proportional to 27,835.60, 38,418 and 21,143.38

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Solution

The fourth proportional to 27,835.60, 38,418 and 21,143.38 is: 29,181.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,835.60 : 38,418 = 21,143.38 : x
  2. Step 2: Convert to fraction form
    27,835.60/38,418 = 21,143.38/x
  3. Step 3: Cross multiply
    27,835.60x = 38,418 × 21,143.38
  4. Step 4: Simplify right side
    27,835.60x = 812,286,372.84
  5. Step 5: Solve for x
    x = 812,286,372.84/27,835.60
  6. Step 6: Final answer
    x = 29,181.57

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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.