Home / 5,413.16-8,119.78-1,715.40

Finding the Fourth Proportional to 5,413.16, 8,119.78 and 1,715.40

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Solution

The fourth proportional to 5,413.16, 8,119.78 and 1,715.40 is: 2,573.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,413.16 : 8,119.78 = 1,715.40 : x
  2. Step 2: Convert to fraction form
    5,413.16/8,119.78 = 1,715.40/x
  3. Step 3: Cross multiply
    5,413.16x = 8,119.78 × 1,715.40
  4. Step 4: Simplify right side
    5,413.16x = 13,928,666.32
  5. Step 5: Solve for x
    x = 13,928,666.32/5,413.16
  6. Step 6: Final answer
    x = 2,573.11

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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.