Home / 12,890.05-19,330.95-4,122.88

Finding the Fourth Proportional to 12,890.05, 19,330.95 and 4,122.88

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Solution

The fourth proportional to 12,890.05, 19,330.95 and 4,122.88 is: 6,183.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,890.05 : 19,330.95 = 4,122.88 : x
  2. Step 2: Convert to fraction form
    12,890.05/19,330.95 = 4,122.88/x
  3. Step 3: Cross multiply
    12,890.05x = 19,330.95 × 4,122.88
  4. Step 4: Simplify right side
    12,890.05x = 79,699,187.14
  5. Step 5: Solve for x
    x = 79,699,187.14/12,890.05
  6. Step 6: Final answer
    x = 6,183.00

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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.