Home / 15,819.85-21,830.79-8,746.39

Finding the Fourth Proportional to 15,819.85, 21,830.79 and 8,746.39

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Solution

The fourth proportional to 15,819.85, 21,830.79 and 8,746.39 is: 12,069.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,819.85 : 21,830.79 = 8,746.39 : x
  2. Step 2: Convert to fraction form
    15,819.85/21,830.79 = 8,746.39/x
  3. Step 3: Cross multiply
    15,819.85x = 21,830.79 × 8,746.39
  4. Step 4: Simplify right side
    15,819.85x = 190,940,603.35
  5. Step 5: Solve for x
    x = 190,940,603.35/15,819.85
  6. Step 6: Final answer
    x = 12,069.68

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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.