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Finding the Fourth Proportional to 13,803.76, 19,048.80 and 8,138.64

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Solution

The fourth proportional to 13,803.76, 19,048.80 and 8,138.64 is: 11,231.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,803.76 : 19,048.80 = 8,138.64 : x
  2. Step 2: Convert to fraction form
    13,803.76/19,048.80 = 8,138.64/x
  3. Step 3: Cross multiply
    13,803.76x = 19,048.80 × 8,138.64
  4. Step 4: Simplify right side
    13,803.76x = 155,031,325.63
  5. Step 5: Solve for x
    x = 155,031,325.63/13,803.76
  6. Step 6: Final answer
    x = 11,231.09

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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.