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Finding the Fourth Proportional to 15,758.84, 21,746.94 and 8,685.92

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Solution

The fourth proportional to 15,758.84, 21,746.94 and 8,685.92 is: 11,986.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,758.84 : 21,746.94 = 8,685.92 : x
  2. Step 2: Convert to fraction form
    15,758.84/21,746.94 = 8,685.92/x
  3. Step 3: Cross multiply
    15,758.84x = 21,746.94 × 8,685.92
  4. Step 4: Simplify right side
    15,758.84x = 188,892,181.08
  5. Step 5: Solve for x
    x = 188,892,181.08/15,758.84
  6. Step 6: Final answer
    x = 11,986.43

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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.