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Finding the Fourth Proportional to 13,360.67, 18,438 and 8,054.36

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Solution

The fourth proportional to 13,360.67, 18,438 and 8,054.36 is: 11,115.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,360.67 : 18,438 = 8,054.36 : x
  2. Step 2: Convert to fraction form
    13,360.67/18,438 = 8,054.36/x
  3. Step 3: Cross multiply
    13,360.67x = 18,438 × 8,054.36
  4. Step 4: Simplify right side
    13,360.67x = 148,506,289.68
  5. Step 5: Solve for x
    x = 148,506,289.68/13,360.67
  6. Step 6: Final answer
    x = 11,115.18

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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.