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Finding the Fourth Proportional to 9,138.96, 13,712.72 and 4,754.08

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Solution

The fourth proportional to 9,138.96, 13,712.72 and 4,754.08 is: 7,133.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,138.96 : 13,712.72 = 4,754.08 : x
  2. Step 2: Convert to fraction form
    9,138.96/13,712.72 = 4,754.08/x
  3. Step 3: Cross multiply
    9,138.96x = 13,712.72 × 4,754.08
  4. Step 4: Simplify right side
    9,138.96x = 65,191,367.90
  5. Step 5: Solve for x
    x = 65,191,367.90/9,138.96
  6. Step 6: Final answer
    x = 7,133.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.