Home / 19,152.87-28,681.11-12,111.54

Finding the Fourth Proportional to 19,152.87, 28,681.11 and 12,111.54

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Solution

The fourth proportional to 19,152.87, 28,681.11 and 12,111.54 is: 18,136.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,152.87 : 28,681.11 = 12,111.54 : x
  2. Step 2: Convert to fraction form
    19,152.87/28,681.11 = 12,111.54/x
  3. Step 3: Cross multiply
    19,152.87x = 28,681.11 × 12,111.54
  4. Step 4: Simplify right side
    19,152.87x = 347,372,411.01
  5. Step 5: Solve for x
    x = 347,372,411.01/19,152.87
  6. Step 6: Final answer
    x = 18,136.83

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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.