Home / 15,395.14-21,245.31-8,321.57

Finding the Fourth Proportional to 15,395.14, 21,245.31 and 8,321.57

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Solution

The fourth proportional to 15,395.14, 21,245.31 and 8,321.57 is: 11,483.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,395.14 : 21,245.31 = 8,321.57 : x
  2. Step 2: Convert to fraction form
    15,395.14/21,245.31 = 8,321.57/x
  3. Step 3: Cross multiply
    15,395.14x = 21,245.31 × 8,321.57
  4. Step 4: Simplify right side
    15,395.14x = 176,794,186.50
  5. Step 5: Solve for x
    x = 176,794,186.50/15,395.14
  6. Step 6: Final answer
    x = 11,483.77

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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.