Home / 12,990.75-19,485.30-5,092.95

Finding the Fourth Proportional to 12,990.75, 19,485.30 and 5,092.95

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Solution

The fourth proportional to 12,990.75, 19,485.30 and 5,092.95 is: 7,639.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,990.75 : 19,485.30 = 5,092.95 : x
  2. Step 2: Convert to fraction form
    12,990.75/19,485.30 = 5,092.95/x
  3. Step 3: Cross multiply
    12,990.75x = 19,485.30 × 5,092.95
  4. Step 4: Simplify right side
    12,990.75x = 99,237,658.64
  5. Step 5: Solve for x
    x = 99,237,658.64/12,990.75
  6. Step 6: Final answer
    x = 7,639.10

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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.