Home / 20,427.23-30,649.53-11,543.78

Finding the Fourth Proportional to 20,427.23, 30,649.53 and 11,543.78

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Solution

The fourth proportional to 20,427.23, 30,649.53 and 11,543.78 is: 17,320.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,427.23 : 30,649.53 = 11,543.78 : x
  2. Step 2: Convert to fraction form
    20,427.23/30,649.53 = 11,543.78/x
  3. Step 3: Cross multiply
    20,427.23x = 30,649.53 × 11,543.78
  4. Step 4: Simplify right side
    20,427.23x = 353,811,431.42
  5. Step 5: Solve for x
    x = 353,811,431.42/20,427.23
  6. Step 6: Final answer
    x = 17,320.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.