Home / 15,431.32-21,295.20-8,357.68

Finding the Fourth Proportional to 15,431.32, 21,295.20 and 8,357.68

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Solution

The fourth proportional to 15,431.32, 21,295.20 and 8,357.68 is: 11,533.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,431.32 : 21,295.20 = 8,357.68 : x
  2. Step 2: Convert to fraction form
    15,431.32/21,295.20 = 8,357.68/x
  3. Step 3: Cross multiply
    15,431.32x = 21,295.20 × 8,357.68
  4. Step 4: Simplify right side
    15,431.32x = 177,978,467.14
  5. Step 5: Solve for x
    x = 177,978,467.14/15,431.32
  6. Step 6: Final answer
    x = 11,533.59

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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.