Home / 20,603.34-28,428.81-12,106.85

Finding the Fourth Proportional to 20,603.34, 28,428.81 and 12,106.85

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Solution

The fourth proportional to 20,603.34, 28,428.81 and 12,106.85 is: 16,705.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,603.34 : 28,428.81 = 12,106.85 : x
  2. Step 2: Convert to fraction form
    20,603.34/28,428.81 = 12,106.85/x
  3. Step 3: Cross multiply
    20,603.34x = 28,428.81 × 12,106.85
  4. Step 4: Simplify right side
    20,603.34x = 344,183,297.54
  5. Step 5: Solve for x
    x = 344,183,297.54/20,603.34
  6. Step 6: Final answer
    x = 16,705.22

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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.