Home / 12,840.15-19,258.70-3,479.58

Finding the Fourth Proportional to 12,840.15, 19,258.70 and 3,479.58

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Solution

The fourth proportional to 12,840.15, 19,258.70 and 3,479.58 is: 5,218.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,840.15 : 19,258.70 = 3,479.58 : x
  2. Step 2: Convert to fraction form
    12,840.15/19,258.70 = 3,479.58/x
  3. Step 3: Cross multiply
    12,840.15x = 19,258.70 × 3,479.58
  4. Step 4: Simplify right side
    12,840.15x = 67,012,187.35
  5. Step 5: Solve for x
    x = 67,012,187.35/12,840.15
  6. Step 6: Final answer
    x = 5,218.96

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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.