Home / 13,314.04-18,370.10-8,138.60

Finding the Fourth Proportional to 13,314.04, 18,370.10 and 8,138.60

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Solution

The fourth proportional to 13,314.04, 18,370.10 and 8,138.60 is: 11,229.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,314.04 : 18,370.10 = 8,138.60 : x
  2. Step 2: Convert to fraction form
    13,314.04/18,370.10 = 8,138.60/x
  3. Step 3: Cross multiply
    13,314.04x = 18,370.10 × 8,138.60
  4. Step 4: Simplify right side
    13,314.04x = 149,506,895.86
  5. Step 5: Solve for x
    x = 149,506,895.86/13,314.04
  6. Step 6: Final answer
    x = 11,229.27

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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.