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Finding the Fourth Proportional to 26,412.40, 39,620.40 and 8,399.20

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Solution

The fourth proportional to 26,412.40, 39,620.40 and 8,399.20 is: 12,599.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,412.40 : 39,620.40 = 8,399.20 : x
  2. Step 2: Convert to fraction form
    26,412.40/39,620.40 = 8,399.20/x
  3. Step 3: Cross multiply
    26,412.40x = 39,620.40 × 8,399.20
  4. Step 4: Simplify right side
    26,412.40x = 332,779,663.68
  5. Step 5: Solve for x
    x = 332,779,663.68/26,412.40
  6. Step 6: Final answer
    x = 12,599.37

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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.