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Finding the Fourth Proportional to 20,543.60, 30,847.80 and 11,795.60

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Solution

The fourth proportional to 20,543.60, 30,847.80 and 11,795.60 is: 17,712.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,543.60 : 30,847.80 = 11,795.60 : x
  2. Step 2: Convert to fraction form
    20,543.60/30,847.80 = 11,795.60/x
  3. Step 3: Cross multiply
    20,543.60x = 30,847.80 × 11,795.60
  4. Step 4: Simplify right side
    20,543.60x = 363,868,309.68
  5. Step 5: Solve for x
    x = 363,868,309.68/20,543.60
  6. Step 6: Final answer
    x = 17,712.00

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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.