Home / 12,983.66-19,478.28-4,218.38

Finding the Fourth Proportional to 12,983.66, 19,478.28 and 4,218.38

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Solution

The fourth proportional to 12,983.66, 19,478.28 and 4,218.38 is: 6,328.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,983.66 : 19,478.28 = 4,218.38 : x
  2. Step 2: Convert to fraction form
    12,983.66/19,478.28 = 4,218.38/x
  3. Step 3: Cross multiply
    12,983.66x = 19,478.28 × 4,218.38
  4. Step 4: Simplify right side
    12,983.66x = 82,166,786.79
  5. Step 5: Solve for x
    x = 82,166,786.79/12,983.66
  6. Step 6: Final answer
    x = 6,328.48

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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.