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Finding the Fourth Proportional to 13,645.44, 18,830.52 and 7,984.08

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Solution

The fourth proportional to 13,645.44, 18,830.52 and 7,984.08 is: 11,017.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,645.44 : 18,830.52 = 7,984.08 : x
  2. Step 2: Convert to fraction form
    13,645.44/18,830.52 = 7,984.08/x
  3. Step 3: Cross multiply
    13,645.44x = 18,830.52 × 7,984.08
  4. Step 4: Simplify right side
    13,645.44x = 150,344,378.12
  5. Step 5: Solve for x
    x = 150,344,378.12/13,645.44
  6. Step 6: Final answer
    x = 11,017.92

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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.