Home / 13,328.20-18,390.18-8,021.80

Finding the Fourth Proportional to 13,328.20, 18,390.18 and 8,021.80

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Solution

The fourth proportional to 13,328.20, 18,390.18 and 8,021.80 is: 11,068.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,328.20 : 18,390.18 = 8,021.80 : x
  2. Step 2: Convert to fraction form
    13,328.20/18,390.18 = 8,021.80/x
  3. Step 3: Cross multiply
    13,328.20x = 18,390.18 × 8,021.80
  4. Step 4: Simplify right side
    13,328.20x = 147,522,345.92
  5. Step 5: Solve for x
    x = 147,522,345.92/13,328.20
  6. Step 6: Final answer
    x = 11,068.44

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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.