Home / 12,145.08-18,221.04-4,647.72

Finding the Fourth Proportional to 12,145.08, 18,221.04 and 4,647.72

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Solution

The fourth proportional to 12,145.08, 18,221.04 and 4,647.72 is: 6,972.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,145.08 : 18,221.04 = 4,647.72 : x
  2. Step 2: Convert to fraction form
    12,145.08/18,221.04 = 4,647.72/x
  3. Step 3: Cross multiply
    12,145.08x = 18,221.04 × 4,647.72
  4. Step 4: Simplify right side
    12,145.08x = 84,686,292.03
  5. Step 5: Solve for x
    x = 84,686,292.03/12,145.08
  6. Step 6: Final answer
    x = 6,972.89

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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.