Home / 15,819.64-21,830.80-8,745.91

Finding the Fourth Proportional to 15,819.64, 21,830.80 and 8,745.91

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Solution

The fourth proportional to 15,819.64, 21,830.80 and 8,745.91 is: 12,069.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,819.64 : 21,830.80 = 8,745.91 : x
  2. Step 2: Convert to fraction form
    15,819.64/21,830.80 = 8,745.91/x
  3. Step 3: Cross multiply
    15,819.64x = 21,830.80 × 8,745.91
  4. Step 4: Simplify right side
    15,819.64x = 190,930,212.03
  5. Step 5: Solve for x
    x = 190,930,212.03/15,819.64
  6. Step 6: Final answer
    x = 12,069.19

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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.