Home / 12,018.78-18,017.72-5,775.66

Finding the Fourth Proportional to 12,018.78, 18,017.72 and 5,775.66

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Solution

The fourth proportional to 12,018.78, 18,017.72 and 5,775.66 is: 8,658.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,018.78 : 18,017.72 = 5,775.66 : x
  2. Step 2: Convert to fraction form
    12,018.78/18,017.72 = 5,775.66/x
  3. Step 3: Cross multiply
    12,018.78x = 18,017.72 × 5,775.66
  4. Step 4: Simplify right side
    12,018.78x = 104,064,224.70
  5. Step 5: Solve for x
    x = 104,064,224.70/12,018.78
  6. Step 6: Final answer
    x = 8,658.47

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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.