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Finding the Fourth Proportional to 19,123.95, 28,557.16 and 15,620.95

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Solution

The fourth proportional to 19,123.95, 28,557.16 and 15,620.95 is: 23,326.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,123.95 : 28,557.16 = 15,620.95 : x
  2. Step 2: Convert to fraction form
    19,123.95/28,557.16 = 15,620.95/x
  3. Step 3: Cross multiply
    19,123.95x = 28,557.16 × 15,620.95
  4. Step 4: Simplify right side
    19,123.95x = 446,089,965.15
  5. Step 5: Solve for x
    x = 446,089,965.15/19,123.95
  6. Step 6: Final answer
    x = 23,326.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.