Home / 12,826.55-19,231.53-8,430.68

Finding the Fourth Proportional to 12,826.55, 19,231.53 and 8,430.68

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Solution

The fourth proportional to 12,826.55, 19,231.53 and 8,430.68 is: 12,640.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,826.55 : 19,231.53 = 8,430.68 : x
  2. Step 2: Convert to fraction form
    12,826.55/19,231.53 = 8,430.68/x
  3. Step 3: Cross multiply
    12,826.55x = 19,231.53 × 8,430.68
  4. Step 4: Simplify right side
    12,826.55x = 162,134,891.80
  5. Step 5: Solve for x
    x = 162,134,891.80/12,826.55
  6. Step 6: Final answer
    x = 12,640.57

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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.