Home / 12,178.15-18,258.31-3,853.51

Finding the Fourth Proportional to 12,178.15, 18,258.31 and 3,853.51

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Solution

The fourth proportional to 12,178.15, 18,258.31 and 3,853.51 is: 5,777.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,178.15 : 18,258.31 = 3,853.51 : x
  2. Step 2: Convert to fraction form
    12,178.15/18,258.31 = 3,853.51/x
  3. Step 3: Cross multiply
    12,178.15x = 18,258.31 × 3,853.51
  4. Step 4: Simplify right side
    12,178.15x = 70,358,580.17
  5. Step 5: Solve for x
    x = 70,358,580.17/12,178.15
  6. Step 6: Final answer
    x = 5,777.44

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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.