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Finding the Fourth Proportional to 15,808.92, 21,816.75 and 8,735.80

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Solution

The fourth proportional to 15,808.92, 21,816.75 and 8,735.80 is: 12,055.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,808.92 : 21,816.75 = 8,735.80 : x
  2. Step 2: Convert to fraction form
    15,808.92/21,816.75 = 8,735.80/x
  3. Step 3: Cross multiply
    15,808.92x = 21,816.75 × 8,735.80
  4. Step 4: Simplify right side
    15,808.92x = 190,586,611.89
  5. Step 5: Solve for x
    x = 190,586,611.89/15,808.92
  6. Step 6: Final answer
    x = 12,055.64

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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.