Home / 20,431.55-28,188.19-13,362.01

Finding the Fourth Proportional to 20,431.55, 28,188.19 and 13,362.01

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Solution

The fourth proportional to 20,431.55, 28,188.19 and 13,362.01 is: 18,434.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,431.55 : 28,188.19 = 13,362.01 : x
  2. Step 2: Convert to fraction form
    20,431.55/28,188.19 = 13,362.01/x
  3. Step 3: Cross multiply
    20,431.55x = 28,188.19 × 13,362.01
  4. Step 4: Simplify right side
    20,431.55x = 376,650,876.66
  5. Step 5: Solve for x
    x = 376,650,876.66/20,431.55
  6. Step 6: Final answer
    x = 18,434.77

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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.