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Finding the Fourth Proportional to 12,708.95, 19,059.98 and 5,311.85

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Solution

The fourth proportional to 12,708.95, 19,059.98 and 5,311.85 is: 7,966.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,708.95 : 19,059.98 = 5,311.85 : x
  2. Step 2: Convert to fraction form
    12,708.95/19,059.98 = 5,311.85/x
  3. Step 3: Cross multiply
    12,708.95x = 19,059.98 × 5,311.85
  4. Step 4: Simplify right side
    12,708.95x = 101,243,632.90
  5. Step 5: Solve for x
    x = 101,243,632.90/12,708.95
  6. Step 6: Final answer
    x = 7,966.33

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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.