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Finding the Fourth Proportional to 13,362.78, 20,051.28 and 7,519.80

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Solution

The fourth proportional to 13,362.78, 20,051.28 and 7,519.80 is: 11,283.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,362.78 : 20,051.28 = 7,519.80 : x
  2. Step 2: Convert to fraction form
    13,362.78/20,051.28 = 7,519.80/x
  3. Step 3: Cross multiply
    13,362.78x = 20,051.28 × 7,519.80
  4. Step 4: Simplify right side
    13,362.78x = 150,781,615.34
  5. Step 5: Solve for x
    x = 150,781,615.34/13,362.78
  6. Step 6: Final answer
    x = 11,283.70

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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.