Home / 15,333.81-21,161.07-8,620.05

Finding the Fourth Proportional to 15,333.81, 21,161.07 and 8,620.05

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Solution

The fourth proportional to 15,333.81, 21,161.07 and 8,620.05 is: 11,895.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,333.81 : 21,161.07 = 8,620.05 : x
  2. Step 2: Convert to fraction form
    15,333.81/21,161.07 = 8,620.05/x
  3. Step 3: Cross multiply
    15,333.81x = 21,161.07 × 8,620.05
  4. Step 4: Simplify right side
    15,333.81x = 182,409,481.45
  5. Step 5: Solve for x
    x = 182,409,481.45/15,333.81
  6. Step 6: Final answer
    x = 11,895.90

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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.