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Finding the Fourth Proportional to 28,134.40, 42,201.60 and 17,636.80

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Solution

The fourth proportional to 28,134.40, 42,201.60 and 17,636.80 is: 26,455.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,134.40 : 42,201.60 = 17,636.80 : x
  2. Step 2: Convert to fraction form
    28,134.40/42,201.60 = 17,636.80/x
  3. Step 3: Cross multiply
    28,134.40x = 42,201.60 × 17,636.80
  4. Step 4: Simplify right side
    28,134.40x = 744,301,178.88
  5. Step 5: Solve for x
    x = 744,301,178.88/28,134.40
  6. Step 6: Final answer
    x = 26,455.20

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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.