Home / 13,702.04-18,906.78-8,321.68

Finding the Fourth Proportional to 13,702.04, 18,906.78 and 8,321.68

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Solution

The fourth proportional to 13,702.04, 18,906.78 and 8,321.68 is: 11,482.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,702.04 : 18,906.78 = 8,321.68 : x
  2. Step 2: Convert to fraction form
    13,702.04/18,906.78 = 8,321.68/x
  3. Step 3: Cross multiply
    13,702.04x = 18,906.78 × 8,321.68
  4. Step 4: Simplify right side
    13,702.04x = 157,336,172.99
  5. Step 5: Solve for x
    x = 157,336,172.99/13,702.04
  6. Step 6: Final answer
    x = 11,482.68

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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.