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Finding the Fourth Proportional to 20,143.58, 30,204.98 and 9,040.74

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Solution

The fourth proportional to 20,143.58, 30,204.98 and 9,040.74 is: 13,556.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,143.58 : 30,204.98 = 9,040.74 : x
  2. Step 2: Convert to fraction form
    20,143.58/30,204.98 = 9,040.74/x
  3. Step 3: Cross multiply
    20,143.58x = 30,204.98 × 9,040.74
  4. Step 4: Simplify right side
    20,143.58x = 273,075,325.68
  5. Step 5: Solve for x
    x = 273,075,325.68/20,143.58
  6. Step 6: Final answer
    x = 13,556.45

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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.