Home / 15,819.57-21,830.91-8,745.93

Finding the Fourth Proportional to 15,819.57, 21,830.91 and 8,745.93

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Solution

The fourth proportional to 15,819.57, 21,830.91 and 8,745.93 is: 12,069.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,819.57 : 21,830.91 = 8,745.93 : x
  2. Step 2: Convert to fraction form
    15,819.57/21,830.91 = 8,745.93/x
  3. Step 3: Cross multiply
    15,819.57x = 21,830.91 × 8,745.93
  4. Step 4: Simplify right side
    15,819.57x = 190,931,610.70
  5. Step 5: Solve for x
    x = 190,931,610.70/15,819.57
  6. Step 6: Final answer
    x = 12,069.33

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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.