Home / 12,647.77-18,981.14-4,758.05

Finding the Fourth Proportional to 12,647.77, 18,981.14 and 4,758.05

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Solution

The fourth proportional to 12,647.77, 18,981.14 and 4,758.05 is: 7,140.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,647.77 : 18,981.14 = 4,758.05 : x
  2. Step 2: Convert to fraction form
    12,647.77/18,981.14 = 4,758.05/x
  3. Step 3: Cross multiply
    12,647.77x = 18,981.14 × 4,758.05
  4. Step 4: Simplify right side
    12,647.77x = 90,313,213.18
  5. Step 5: Solve for x
    x = 90,313,213.18/12,647.77
  6. Step 6: Final answer
    x = 7,140.64

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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.