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Finding the Fourth Proportional to 9,138.84, 13,643.34 and 8,814.84

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Solution

The fourth proportional to 9,138.84, 13,643.34 and 8,814.84 is: 13,159.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,138.84 : 13,643.34 = 8,814.84 : x
  2. Step 2: Convert to fraction form
    9,138.84/13,643.34 = 8,814.84/x
  3. Step 3: Cross multiply
    9,138.84x = 13,643.34 × 8,814.84
  4. Step 4: Simplify right side
    9,138.84x = 120,263,859.17
  5. Step 5: Solve for x
    x = 120,263,859.17/9,138.84
  6. Step 6: Final answer
    x = 13,159.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.