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Finding the Fourth Proportional to 9,413.51, 12,989.22 and 5,379.65

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Solution

The fourth proportional to 9,413.51, 12,989.22 and 5,379.65 is: 7,423.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,413.51 : 12,989.22 = 5,379.65 : x
  2. Step 2: Convert to fraction form
    9,413.51/12,989.22 = 5,379.65/x
  3. Step 3: Cross multiply
    9,413.51x = 12,989.22 × 5,379.65
  4. Step 4: Simplify right side
    9,413.51x = 69,877,457.37
  5. Step 5: Solve for x
    x = 69,877,457.37/9,413.51
  6. Step 6: Final answer
    x = 7,423.10

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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.