Home / 20,099.48-30,145.09-7,615.20

Finding the Fourth Proportional to 20,099.48, 30,145.09 and 7,615.20

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Solution

The fourth proportional to 20,099.48, 30,145.09 and 7,615.20 is: 11,421.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,099.48 : 30,145.09 = 7,615.20 : x
  2. Step 2: Convert to fraction form
    20,099.48/30,145.09 = 7,615.20/x
  3. Step 3: Cross multiply
    20,099.48x = 30,145.09 × 7,615.20
  4. Step 4: Simplify right side
    20,099.48x = 229,560,889.37
  5. Step 5: Solve for x
    x = 229,560,889.37/20,099.48
  6. Step 6: Final answer
    x = 11,421.24

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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.