Home / 15,520.20-21,406.44-9,850.08

Finding the Fourth Proportional to 15,520.20, 21,406.44 and 9,850.08

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Solution

The fourth proportional to 15,520.20, 21,406.44 and 9,850.08 is: 13,585.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,520.20 : 21,406.44 = 9,850.08 : x
  2. Step 2: Convert to fraction form
    15,520.20/21,406.44 = 9,850.08/x
  3. Step 3: Cross multiply
    15,520.20x = 21,406.44 × 9,850.08
  4. Step 4: Simplify right side
    15,520.20x = 210,855,146.52
  5. Step 5: Solve for x
    x = 210,855,146.52/15,520.20
  6. Step 6: Final answer
    x = 13,585.85

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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.