Home / 20,515.48-30,760.91-9,408.25

Finding the Fourth Proportional to 20,515.48, 30,760.91 and 9,408.25

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Solution

The fourth proportional to 20,515.48, 30,760.91 and 9,408.25 is: 14,106.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,515.48 : 30,760.91 = 9,408.25 : x
  2. Step 2: Convert to fraction form
    20,515.48/30,760.91 = 9,408.25/x
  3. Step 3: Cross multiply
    20,515.48x = 30,760.91 × 9,408.25
  4. Step 4: Simplify right side
    20,515.48x = 289,406,331.51
  5. Step 5: Solve for x
    x = 289,406,331.51/20,515.48
  6. Step 6: Final answer
    x = 14,106.73

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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.