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Finding the Fourth Proportional to 15,194.32, 20,970.08 and 8,819.56

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Solution

The fourth proportional to 15,194.32, 20,970.08 and 8,819.56 is: 12,172.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,194.32 : 20,970.08 = 8,819.56 : x
  2. Step 2: Convert to fraction form
    15,194.32/20,970.08 = 8,819.56/x
  3. Step 3: Cross multiply
    15,194.32x = 20,970.08 × 8,819.56
  4. Step 4: Simplify right side
    15,194.32x = 184,946,878.76
  5. Step 5: Solve for x
    x = 184,946,878.76/15,194.32
  6. Step 6: Final answer
    x = 12,172.11

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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.