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Finding the Fourth Proportional to 13,401.40, 20,063.70 and 8,217.40

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Solution

The fourth proportional to 13,401.40, 20,063.70 and 8,217.40 is: 12,302.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,401.40 : 20,063.70 = 8,217.40 : x
  2. Step 2: Convert to fraction form
    13,401.40/20,063.70 = 8,217.40/x
  3. Step 3: Cross multiply
    13,401.40x = 20,063.70 × 8,217.40
  4. Step 4: Simplify right side
    13,401.40x = 164,871,448.38
  5. Step 5: Solve for x
    x = 164,871,448.38/13,401.40
  6. Step 6: Final answer
    x = 12,302.55

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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.