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Finding the Fourth Proportional to 15,795.70, 21,797.98 and 8,722.08

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Solution

The fourth proportional to 15,795.70, 21,797.98 and 8,722.08 is: 12,036.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,795.70 : 21,797.98 = 8,722.08 : x
  2. Step 2: Convert to fraction form
    15,795.70/21,797.98 = 8,722.08/x
  3. Step 3: Cross multiply
    15,795.70x = 21,797.98 × 8,722.08
  4. Step 4: Simplify right side
    15,795.70x = 190,123,703.59
  5. Step 5: Solve for x
    x = 190,123,703.59/15,795.70
  6. Step 6: Final answer
    x = 12,036.42

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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.