Home / 12,816.91-19,190.63-6,647.95

Finding the Fourth Proportional to 12,816.91, 19,190.63 and 6,647.95

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Solution

The fourth proportional to 12,816.91, 19,190.63 and 6,647.95 is: 9,953.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,816.91 : 19,190.63 = 6,647.95 : x
  2. Step 2: Convert to fraction form
    12,816.91/19,190.63 = 6,647.95/x
  3. Step 3: Cross multiply
    12,816.91x = 19,190.63 × 6,647.95
  4. Step 4: Simplify right side
    12,816.91x = 127,578,388.38
  5. Step 5: Solve for x
    x = 127,578,388.38/12,816.91
  6. Step 6: Final answer
    x = 9,953.91

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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.