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Finding the Fourth Proportional to 12,838.70, 19,258.05 and 3,604.70

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Solution

The fourth proportional to 12,838.70, 19,258.05 and 3,604.70 is: 5,407.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,838.70 : 19,258.05 = 3,604.70 : x
  2. Step 2: Convert to fraction form
    12,838.70/19,258.05 = 3,604.70/x
  3. Step 3: Cross multiply
    12,838.70x = 19,258.05 × 3,604.70
  4. Step 4: Simplify right side
    12,838.70x = 69,419,492.84
  5. Step 5: Solve for x
    x = 69,419,492.84/12,838.70
  6. Step 6: Final answer
    x = 5,407.05

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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.