Home / 13,418.61-20,128.91-3,557.67

Finding the Fourth Proportional to 13,418.61, 20,128.91 and 3,557.67

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Solution

The fourth proportional to 13,418.61, 20,128.91 and 3,557.67 is: 5,336.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,418.61 : 20,128.91 = 3,557.67 : x
  2. Step 2: Convert to fraction form
    13,418.61/20,128.91 = 3,557.67/x
  3. Step 3: Cross multiply
    13,418.61x = 20,128.91 × 3,557.67
  4. Step 4: Simplify right side
    13,418.61x = 71,612,039.19
  5. Step 5: Solve for x
    x = 71,612,039.19/13,418.61
  6. Step 6: Final answer
    x = 5,336.77

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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.