Home / 12,090.45-18,133.63-5,515.10

Finding the Fourth Proportional to 12,090.45, 18,133.63 and 5,515.10

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Solution

The fourth proportional to 12,090.45, 18,133.63 and 5,515.10 is: 8,271.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,090.45 : 18,133.63 = 5,515.10 : x
  2. Step 2: Convert to fraction form
    12,090.45/18,133.63 = 5,515.10/x
  3. Step 3: Cross multiply
    12,090.45x = 18,133.63 × 5,515.10
  4. Step 4: Simplify right side
    12,090.45x = 100,008,746.36
  5. Step 5: Solve for x
    x = 100,008,746.36/12,090.45
  6. Step 6: Final answer
    x = 8,271.71

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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.