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Finding the Fourth Proportional to 28,202.40, 42,302.40 and 11,556.96

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Solution

The fourth proportional to 28,202.40, 42,302.40 and 11,556.96 is: 17,334.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,202.40 : 42,302.40 = 11,556.96 : x
  2. Step 2: Convert to fraction form
    28,202.40/42,302.40 = 11,556.96/x
  3. Step 3: Cross multiply
    28,202.40x = 42,302.40 × 11,556.96
  4. Step 4: Simplify right side
    28,202.40x = 488,887,144.70
  5. Step 5: Solve for x
    x = 488,887,144.70/28,202.40
  6. Step 6: Final answer
    x = 17,334.95

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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.