Home / 12,103.68-18,139.80-5,435.24

Finding the Fourth Proportional to 12,103.68, 18,139.80 and 5,435.24

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Solution

The fourth proportional to 12,103.68, 18,139.80 and 5,435.24 is: 8,145.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,103.68 : 18,139.80 = 5,435.24 : x
  2. Step 2: Convert to fraction form
    12,103.68/18,139.80 = 5,435.24/x
  3. Step 3: Cross multiply
    12,103.68x = 18,139.80 × 5,435.24
  4. Step 4: Simplify right side
    12,103.68x = 98,594,166.55
  5. Step 5: Solve for x
    x = 98,594,166.55/12,103.68
  6. Step 6: Final answer
    x = 8,145.80

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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.