Home / 13,389.78-20,051.33-8,127.21

Finding the Fourth Proportional to 13,389.78, 20,051.33 and 8,127.21

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Solution

The fourth proportional to 13,389.78, 20,051.33 and 8,127.21 is: 12,170.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,389.78 : 20,051.33 = 8,127.21 : x
  2. Step 2: Convert to fraction form
    13,389.78/20,051.33 = 8,127.21/x
  3. Step 3: Cross multiply
    13,389.78x = 20,051.33 × 8,127.21
  4. Step 4: Simplify right side
    13,389.78x = 162,961,329.05
  5. Step 5: Solve for x
    x = 162,961,329.05/13,389.78
  6. Step 6: Final answer
    x = 12,170.58

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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.