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Finding the Fourth Proportional to 18,719, 28,083.14 and 5,571.34

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Solution

The fourth proportional to 18,719, 28,083.14 and 5,571.34 is: 8,358.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,719 : 28,083.14 = 5,571.34 : x
  2. Step 2: Convert to fraction form
    18,719/28,083.14 = 5,571.34/x
  3. Step 3: Cross multiply
    18,719x = 28,083.14 × 5,571.34
  4. Step 4: Simplify right side
    18,719x = 156,460,721.21
  5. Step 5: Solve for x
    x = 156,460,721.21/18,719
  6. Step 6: Final answer
    x = 8,358.39

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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.