Home / 12,180.74-18,271.08-4,780.02

Finding the Fourth Proportional to 12,180.74, 18,271.08 and 4,780.02

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Solution

The fourth proportional to 12,180.74, 18,271.08 and 4,780.02 is: 7,170.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,180.74 : 18,271.08 = 4,780.02 : x
  2. Step 2: Convert to fraction form
    12,180.74/18,271.08 = 4,780.02/x
  3. Step 3: Cross multiply
    12,180.74x = 18,271.08 × 4,780.02
  4. Step 4: Simplify right side
    12,180.74x = 87,336,082.88
  5. Step 5: Solve for x
    x = 87,336,082.88/12,180.74
  6. Step 6: Final answer
    x = 7,170.02

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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.