Home / 20,406.42-28,161.54-11,455.56

Finding the Fourth Proportional to 20,406.42, 28,161.54 and 11,455.56

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Solution

The fourth proportional to 20,406.42, 28,161.54 and 11,455.56 is: 15,809.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,406.42 : 28,161.54 = 11,455.56 : x
  2. Step 2: Convert to fraction form
    20,406.42/28,161.54 = 11,455.56/x
  3. Step 3: Cross multiply
    20,406.42x = 28,161.54 × 11,455.56
  4. Step 4: Simplify right side
    20,406.42x = 322,606,211.16
  5. Step 5: Solve for x
    x = 322,606,211.16/20,406.42
  6. Step 6: Final answer
    x = 15,809.05

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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.