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Finding the Fourth Proportional to 15,485.82, 21,375.33 and 9,896.82

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Solution

The fourth proportional to 15,485.82, 21,375.33 and 9,896.82 is: 13,660.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,485.82 : 21,375.33 = 9,896.82 : x
  2. Step 2: Convert to fraction form
    15,485.82/21,375.33 = 9,896.82/x
  3. Step 3: Cross multiply
    15,485.82x = 21,375.33 × 9,896.82
  4. Step 4: Simplify right side
    15,485.82x = 211,547,793.45
  5. Step 5: Solve for x
    x = 211,547,793.45/15,485.82
  6. Step 6: Final answer
    x = 13,660.74

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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.