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Finding the Fourth Proportional to 20,401.60, 30,602.40 and 13,403.20

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Solution

The fourth proportional to 20,401.60, 30,602.40 and 13,403.20 is: 20,104.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,401.60 : 30,602.40 = 13,403.20 : x
  2. Step 2: Convert to fraction form
    20,401.60/30,602.40 = 13,403.20/x
  3. Step 3: Cross multiply
    20,401.60x = 30,602.40 × 13,403.20
  4. Step 4: Simplify right side
    20,401.60x = 410,170,087.68
  5. Step 5: Solve for x
    x = 410,170,087.68/20,401.60
  6. Step 6: Final answer
    x = 20,104.80

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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.