Home / 18,972.84-28,459.20-5,121.84

Finding the Fourth Proportional to 18,972.84, 28,459.20 and 5,121.84

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Solution

The fourth proportional to 18,972.84, 28,459.20 and 5,121.84 is: 7,682.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,972.84 : 28,459.20 = 5,121.84 : x
  2. Step 2: Convert to fraction form
    18,972.84/28,459.20 = 5,121.84/x
  3. Step 3: Cross multiply
    18,972.84x = 28,459.20 × 5,121.84
  4. Step 4: Simplify right side
    18,972.84x = 145,763,468.93
  5. Step 5: Solve for x
    x = 145,763,468.93/18,972.84
  6. Step 6: Final answer
    x = 7,682.74

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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.