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Finding the Fourth Proportional to 19,503.60, 26,920.80 and 11,441.76

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Solution

The fourth proportional to 19,503.60, 26,920.80 and 11,441.76 is: 15,793.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,503.60 : 26,920.80 = 11,441.76 : x
  2. Step 2: Convert to fraction form
    19,503.60/26,920.80 = 11,441.76/x
  3. Step 3: Cross multiply
    19,503.60x = 26,920.80 × 11,441.76
  4. Step 4: Simplify right side
    19,503.60x = 308,021,332.61
  5. Step 5: Solve for x
    x = 308,021,332.61/19,503.60
  6. Step 6: Final answer
    x = 15,793.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.