Home / 12,147.21-18,213.57-4,743

Finding the Fourth Proportional to 12,147.21, 18,213.57 and 4,743

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Solution

The fourth proportional to 12,147.21, 18,213.57 and 4,743 is: 7,111.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,147.21 : 18,213.57 = 4,743 : x
  2. Step 2: Convert to fraction form
    12,147.21/18,213.57 = 4,743/x
  3. Step 3: Cross multiply
    12,147.21x = 18,213.57 × 4,743
  4. Step 4: Simplify right side
    12,147.21x = 86,386,962.51
  5. Step 5: Solve for x
    x = 86,386,962.51/12,147.21
  6. Step 6: Final answer
    x = 7,111.67

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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.