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Finding the Fourth Proportional to 9,140.12, 13,715.64 and 8,396.54

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Solution

The fourth proportional to 9,140.12, 13,715.64 and 8,396.54 is: 12,599.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,140.12 : 13,715.64 = 8,396.54 : x
  2. Step 2: Convert to fraction form
    9,140.12/13,715.64 = 8,396.54/x
  3. Step 3: Cross multiply
    9,140.12x = 13,715.64 × 8,396.54
  4. Step 4: Simplify right side
    9,140.12x = 115,163,809.32
  5. Step 5: Solve for x
    x = 115,163,809.32/9,140.12
  6. Step 6: Final answer
    x = 12,599.82

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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.