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Finding the Fourth Proportional to 5,413.80, 8,111.90 and 4,895.40

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Solution

The fourth proportional to 5,413.80, 8,111.90 and 4,895.40 is: 7,335.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,413.80 : 8,111.90 = 4,895.40 : x
  2. Step 2: Convert to fraction form
    5,413.80/8,111.90 = 4,895.40/x
  3. Step 3: Cross multiply
    5,413.80x = 8,111.90 × 4,895.40
  4. Step 4: Simplify right side
    5,413.80x = 39,710,995.26
  5. Step 5: Solve for x
    x = 39,710,995.26/5,413.80
  6. Step 6: Final answer
    x = 7,335.14

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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.