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Finding the Fourth Proportional to 15,819.84, 21,830.52 and 8,745.84

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Solution

The fourth proportional to 15,819.84, 21,830.52 and 8,745.84 is: 12,068.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,819.84 : 21,830.52 = 8,745.84 : x
  2. Step 2: Convert to fraction form
    15,819.84/21,830.52 = 8,745.84/x
  3. Step 3: Cross multiply
    15,819.84x = 21,830.52 × 8,745.84
  4. Step 4: Simplify right side
    15,819.84x = 190,926,235.04
  5. Step 5: Solve for x
    x = 190,926,235.04/15,819.84
  6. Step 6: Final answer
    x = 12,068.78

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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.