Home / 20,913.42-28,861.11-12,413.46

Finding the Fourth Proportional to 20,913.42, 28,861.11 and 12,413.46

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Solution

The fourth proportional to 20,913.42, 28,861.11 and 12,413.46 is: 17,130.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,913.42 : 28,861.11 = 12,413.46 : x
  2. Step 2: Convert to fraction form
    20,913.42/28,861.11 = 12,413.46/x
  3. Step 3: Cross multiply
    20,913.42x = 28,861.11 × 12,413.46
  4. Step 4: Simplify right side
    20,913.42x = 358,266,234.54
  5. Step 5: Solve for x
    x = 358,266,234.54/20,913.42
  6. Step 6: Final answer
    x = 17,130.93

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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.