Home / 15,811.94-21,819.17-8,738.35

Finding the Fourth Proportional to 15,811.94, 21,819.17 and 8,738.35

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Solution

The fourth proportional to 15,811.94, 21,819.17 and 8,738.35 is: 12,058.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,811.94 : 21,819.17 = 8,738.35 : x
  2. Step 2: Convert to fraction form
    15,811.94/21,819.17 = 8,738.35/x
  3. Step 3: Cross multiply
    15,811.94x = 21,819.17 × 8,738.35
  4. Step 4: Simplify right side
    15,811.94x = 190,663,511.47
  5. Step 5: Solve for x
    x = 190,663,511.47/15,811.94
  6. Step 6: Final answer
    x = 12,058.20

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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.