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Finding the Fourth Proportional to 12,859.73, 19,269.64 and 8,918.67

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Solution

The fourth proportional to 12,859.73, 19,269.64 and 8,918.67 is: 13,364.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,859.73 : 19,269.64 = 8,918.67 : x
  2. Step 2: Convert to fraction form
    12,859.73/19,269.64 = 8,918.67/x
  3. Step 3: Cross multiply
    12,859.73x = 19,269.64 × 8,918.67
  4. Step 4: Simplify right side
    12,859.73x = 171,859,515.59
  5. Step 5: Solve for x
    x = 171,859,515.59/12,859.73
  6. Step 6: Final answer
    x = 13,364.17

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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.