Home / 13,621.76-20,396.16-7,994.84

Finding the Fourth Proportional to 13,621.76, 20,396.16 and 7,994.84

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Solution

The fourth proportional to 13,621.76, 20,396.16 and 7,994.84 is: 11,970.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,621.76 : 20,396.16 = 7,994.84 : x
  2. Step 2: Convert to fraction form
    13,621.76/20,396.16 = 7,994.84/x
  3. Step 3: Cross multiply
    13,621.76x = 20,396.16 × 7,994.84
  4. Step 4: Simplify right side
    13,621.76x = 163,064,035.81
  5. Step 5: Solve for x
    x = 163,064,035.81/13,621.76
  6. Step 6: Final answer
    x = 11,970.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.