Home / 13,230.21-18,259.13-8,454.55

Finding the Fourth Proportional to 13,230.21, 18,259.13 and 8,454.55

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Solution

The fourth proportional to 13,230.21, 18,259.13 and 8,454.55 is: 11,668.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,230.21 : 18,259.13 = 8,454.55 : x
  2. Step 2: Convert to fraction form
    13,230.21/18,259.13 = 8,454.55/x
  3. Step 3: Cross multiply
    13,230.21x = 18,259.13 × 8,454.55
  4. Step 4: Simplify right side
    13,230.21x = 154,372,703.03
  5. Step 5: Solve for x
    x = 154,372,703.03/13,230.21
  6. Step 6: Final answer
    x = 11,668.20

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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.