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Finding the Fourth Proportional to 13,503.78, 20,248.83 and 7,883.28

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Solution

The fourth proportional to 13,503.78, 20,248.83 and 7,883.28 is: 11,820.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,503.78 : 20,248.83 = 7,883.28 : x
  2. Step 2: Convert to fraction form
    13,503.78/20,248.83 = 7,883.28/x
  3. Step 3: Cross multiply
    13,503.78x = 20,248.83 × 7,883.28
  4. Step 4: Simplify right side
    13,503.78x = 159,627,196.56
  5. Step 5: Solve for x
    x = 159,627,196.56/13,503.78
  6. Step 6: Final answer
    x = 11,820.93

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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.