Home / 18,970.21-28,443.16-7,884.55

Finding the Fourth Proportional to 18,970.21, 28,443.16 and 7,884.55

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Solution

The fourth proportional to 18,970.21, 28,443.16 and 7,884.55 is: 11,821.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,970.21 : 28,443.16 = 7,884.55 : x
  2. Step 2: Convert to fraction form
    18,970.21/28,443.16 = 7,884.55/x
  3. Step 3: Cross multiply
    18,970.21x = 28,443.16 × 7,884.55
  4. Step 4: Simplify right side
    18,970.21x = 224,261,517.18
  5. Step 5: Solve for x
    x = 224,261,517.18/18,970.21
  6. Step 6: Final answer
    x = 11,821.77

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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.