Home / 15,431.22-21,295.05-8,357.70

Finding the Fourth Proportional to 15,431.22, 21,295.05 and 8,357.70

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Solution

The fourth proportional to 15,431.22, 21,295.05 and 8,357.70 is: 11,533.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,431.22 : 21,295.05 = 8,357.70 : x
  2. Step 2: Convert to fraction form
    15,431.22/21,295.05 = 8,357.70/x
  3. Step 3: Cross multiply
    15,431.22x = 21,295.05 × 8,357.70
  4. Step 4: Simplify right side
    15,431.22x = 177,977,639.39
  5. Step 5: Solve for x
    x = 177,977,639.39/15,431.22
  6. Step 6: Final answer
    x = 11,533.61

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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.