Home / 20,427.55-28,192.64-11,475.05

Finding the Fourth Proportional to 20,427.55, 28,192.64 and 11,475.05

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Solution

The fourth proportional to 20,427.55, 28,192.64 and 11,475.05 is: 15,837.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,427.55 : 28,192.64 = 11,475.05 : x
  2. Step 2: Convert to fraction form
    20,427.55/28,192.64 = 11,475.05/x
  3. Step 3: Cross multiply
    20,427.55x = 28,192.64 × 11,475.05
  4. Step 4: Simplify right side
    20,427.55x = 323,511,896.26
  5. Step 5: Solve for x
    x = 323,511,896.26/20,427.55
  6. Step 6: Final answer
    x = 15,837.04

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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.