Home / 13,767.24-18,999.20-8,102.40

Finding the Fourth Proportional to 13,767.24, 18,999.20 and 8,102.40

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Solution

The fourth proportional to 13,767.24, 18,999.20 and 8,102.40 is: 11,181.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,767.24 : 18,999.20 = 8,102.40 : x
  2. Step 2: Convert to fraction form
    13,767.24/18,999.20 = 8,102.40/x
  3. Step 3: Cross multiply
    13,767.24x = 18,999.20 × 8,102.40
  4. Step 4: Simplify right side
    13,767.24x = 153,939,118.08
  5. Step 5: Solve for x
    x = 153,939,118.08/13,767.24
  6. Step 6: Final answer
    x = 11,181.55

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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.