Home / 13,179.35-19,697.81-12,128.58

Finding the Fourth Proportional to 13,179.35, 19,697.81 and 12,128.58

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Solution

The fourth proportional to 13,179.35, 19,697.81 and 12,128.58 is: 18,127.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,179.35 : 19,697.81 = 12,128.58 : x
  2. Step 2: Convert to fraction form
    13,179.35/19,697.81 = 12,128.58/x
  3. Step 3: Cross multiply
    13,179.35x = 19,697.81 × 12,128.58
  4. Step 4: Simplify right side
    13,179.35x = 238,906,403.77
  5. Step 5: Solve for x
    x = 238,906,403.77/13,179.35
  6. Step 6: Final answer
    x = 18,127.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.