Home / 13,240.72-18,263.64-8,199.28

Finding the Fourth Proportional to 13,240.72, 18,263.64 and 8,199.28

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Solution

The fourth proportional to 13,240.72, 18,263.64 and 8,199.28 is: 11,309.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,240.72 : 18,263.64 = 8,199.28 : x
  2. Step 2: Convert to fraction form
    13,240.72/18,263.64 = 8,199.28/x
  3. Step 3: Cross multiply
    13,240.72x = 18,263.64 × 8,199.28
  4. Step 4: Simplify right side
    13,240.72x = 149,748,698.18
  5. Step 5: Solve for x
    x = 149,748,698.18/13,240.72
  6. Step 6: Final answer
    x = 11,309.71

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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.