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Finding the Fourth Proportional to 13,328.20, 18,393 and 7,359.76

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Solution

The fourth proportional to 13,328.20, 18,393 and 7,359.76 is: 10,156.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,328.20 : 18,393 = 7,359.76 : x
  2. Step 2: Convert to fraction form
    13,328.20/18,393 = 7,359.76/x
  3. Step 3: Cross multiply
    13,328.20x = 18,393 × 7,359.76
  4. Step 4: Simplify right side
    13,328.20x = 135,368,065.68
  5. Step 5: Solve for x
    x = 135,368,065.68/13,328.20
  6. Step 6: Final answer
    x = 10,156.52

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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.