Home / 14,413.05-19,890-8,040.21

Finding the Fourth Proportional to 14,413.05, 19,890 and 8,040.21

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Solution

The fourth proportional to 14,413.05, 19,890 and 8,040.21 is: 11,095.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,413.05 : 19,890 = 8,040.21 : x
  2. Step 2: Convert to fraction form
    14,413.05/19,890 = 8,040.21/x
  3. Step 3: Cross multiply
    14,413.05x = 19,890 × 8,040.21
  4. Step 4: Simplify right side
    14,413.05x = 159,919,776.90
  5. Step 5: Solve for x
    x = 159,919,776.90/14,413.05
  6. Step 6: Final answer
    x = 11,095.48

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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.