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Finding the Fourth Proportional to 20,477.60, 30,748.80 and 15,552.80

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Solution

The fourth proportional to 20,477.60, 30,748.80 and 15,552.80 is: 23,353.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,477.60 : 30,748.80 = 15,552.80 : x
  2. Step 2: Convert to fraction form
    20,477.60/30,748.80 = 15,552.80/x
  3. Step 3: Cross multiply
    20,477.60x = 30,748.80 × 15,552.80
  4. Step 4: Simplify right side
    20,477.60x = 478,229,936.64
  5. Step 5: Solve for x
    x = 478,229,936.64/20,477.60
  6. Step 6: Final answer
    x = 23,353.81

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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.