Home / 12,018.18-18,036.57-7,857.06

Finding the Fourth Proportional to 12,018.18, 18,036.57 and 7,857.06

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Solution

The fourth proportional to 12,018.18, 18,036.57 and 7,857.06 is: 11,791.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,018.18 : 18,036.57 = 7,857.06 : x
  2. Step 2: Convert to fraction form
    12,018.18/18,036.57 = 7,857.06/x
  3. Step 3: Cross multiply
    12,018.18x = 18,036.57 × 7,857.06
  4. Step 4: Simplify right side
    12,018.18x = 141,714,412.68
  5. Step 5: Solve for x
    x = 141,714,412.68/12,018.18
  6. Step 6: Final answer
    x = 11,791.67

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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.