Home / 14,186.16-21,280.68-5,428.44

Finding the Fourth Proportional to 14,186.16, 21,280.68 and 5,428.44

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Solution

The fourth proportional to 14,186.16, 21,280.68 and 5,428.44 is: 8,143.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,186.16 : 21,280.68 = 5,428.44 : x
  2. Step 2: Convert to fraction form
    14,186.16/21,280.68 = 5,428.44/x
  3. Step 3: Cross multiply
    14,186.16x = 21,280.68 × 5,428.44
  4. Step 4: Simplify right side
    14,186.16x = 115,520,894.54
  5. Step 5: Solve for x
    x = 115,520,894.54/14,186.16
  6. Step 6: Final answer
    x = 8,143.21

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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.