Home / 15,500.85-21,390.24-8,427.21

Finding the Fourth Proportional to 15,500.85, 21,390.24 and 8,427.21

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Solution

The fourth proportional to 15,500.85, 21,390.24 and 8,427.21 is: 11,629.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,500.85 : 21,390.24 = 8,427.21 : x
  2. Step 2: Convert to fraction form
    15,500.85/21,390.24 = 8,427.21/x
  3. Step 3: Cross multiply
    15,500.85x = 21,390.24 × 8,427.21
  4. Step 4: Simplify right side
    15,500.85x = 180,260,044.43
  5. Step 5: Solve for x
    x = 180,260,044.43/15,500.85
  6. Step 6: Final answer
    x = 11,629.04

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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.