Home / 20,215.42-27,897.34-11,719.20

Finding the Fourth Proportional to 20,215.42, 27,897.34 and 11,719.20

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Solution

The fourth proportional to 20,215.42, 27,897.34 and 11,719.20 is: 16,172.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,215.42 : 27,897.34 = 11,719.20 : x
  2. Step 2: Convert to fraction form
    20,215.42/27,897.34 = 11,719.20/x
  3. Step 3: Cross multiply
    20,215.42x = 27,897.34 × 11,719.20
  4. Step 4: Simplify right side
    20,215.42x = 326,934,506.93
  5. Step 5: Solve for x
    x = 326,934,506.93/20,215.42
  6. Step 6: Final answer
    x = 16,172.53

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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.