Home / 12,103.20-16,707.60-11,455.20

Finding the Fourth Proportional to 12,103.20, 16,707.60 and 11,455.20

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Solution

The fourth proportional to 12,103.20, 16,707.60 and 11,455.20 is: 15,813.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,103.20 : 16,707.60 = 11,455.20 : x
  2. Step 2: Convert to fraction form
    12,103.20/16,707.60 = 11,455.20/x
  3. Step 3: Cross multiply
    12,103.20x = 16,707.60 × 11,455.20
  4. Step 4: Simplify right side
    12,103.20x = 191,388,899.52
  5. Step 5: Solve for x
    x = 191,388,899.52/12,103.20
  6. Step 6: Final answer
    x = 15,813.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.