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Finding the Fourth Proportional to 13,246.40, 18,279.96 and 7,278.08

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Solution

The fourth proportional to 13,246.40, 18,279.96 and 7,278.08 is: 10,043.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,246.40 : 18,279.96 = 7,278.08 : x
  2. Step 2: Convert to fraction form
    13,246.40/18,279.96 = 7,278.08/x
  3. Step 3: Cross multiply
    13,246.40x = 18,279.96 × 7,278.08
  4. Step 4: Simplify right side
    13,246.40x = 133,043,011.28
  5. Step 5: Solve for x
    x = 133,043,011.28/13,246.40
  6. Step 6: Final answer
    x = 10,043.71

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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.