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Finding the Fourth Proportional to 15,803.37, 21,808.98 and 8,729.64

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Solution

The fourth proportional to 15,803.37, 21,808.98 and 8,729.64 is: 12,047.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,803.37 : 21,808.98 = 8,729.64 : x
  2. Step 2: Convert to fraction form
    15,803.37/21,808.98 = 8,729.64/x
  3. Step 3: Cross multiply
    15,803.37x = 21,808.98 × 8,729.64
  4. Step 4: Simplify right side
    15,803.37x = 190,384,544.17
  5. Step 5: Solve for x
    x = 190,384,544.17/15,803.37
  6. Step 6: Final answer
    x = 12,047.09

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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.