Home / 13,389.80-18,472.08-9,413.48

Finding the Fourth Proportional to 13,389.80, 18,472.08 and 9,413.48

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Solution

The fourth proportional to 13,389.80, 18,472.08 and 9,413.48 is: 12,986.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,389.80 : 18,472.08 = 9,413.48 : x
  2. Step 2: Convert to fraction form
    13,389.80/18,472.08 = 9,413.48/x
  3. Step 3: Cross multiply
    13,389.80x = 18,472.08 × 9,413.48
  4. Step 4: Simplify right side
    13,389.80x = 173,886,555.64
  5. Step 5: Solve for x
    x = 173,886,555.64/13,389.80
  6. Step 6: Final answer
    x = 12,986.49

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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.