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Finding the Fourth Proportional to 20,599.98, 28,425.87 and 12,642.54

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Solution

The fourth proportional to 20,599.98, 28,425.87 and 12,642.54 is: 17,445.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,599.98 : 28,425.87 = 12,642.54 : x
  2. Step 2: Convert to fraction form
    20,599.98/28,425.87 = 12,642.54/x
  3. Step 3: Cross multiply
    20,599.98x = 28,425.87 × 12,642.54
  4. Step 4: Simplify right side
    20,599.98x = 359,375,198.51
  5. Step 5: Solve for x
    x = 359,375,198.51/20,599.98
  6. Step 6: Final answer
    x = 17,445.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.