Home / 13,185.72-18,203.81-8,722.40

Finding the Fourth Proportional to 13,185.72, 18,203.81 and 8,722.40

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Solution

The fourth proportional to 13,185.72, 18,203.81 and 8,722.40 is: 12,041.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,185.72 : 18,203.81 = 8,722.40 : x
  2. Step 2: Convert to fraction form
    13,185.72/18,203.81 = 8,722.40/x
  3. Step 3: Cross multiply
    13,185.72x = 18,203.81 × 8,722.40
  4. Step 4: Simplify right side
    13,185.72x = 158,780,777.71
  5. Step 5: Solve for x
    x = 158,780,777.71/13,185.72
  6. Step 6: Final answer
    x = 12,041.87

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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.