Home / 10,142.90-15,192.82-6,620.46

Finding the Fourth Proportional to 10,142.90, 15,192.82 and 6,620.46

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Solution

The fourth proportional to 10,142.90, 15,192.82 and 6,620.46 is: 9,916.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,142.90 : 15,192.82 = 6,620.46 : x
  2. Step 2: Convert to fraction form
    10,142.90/15,192.82 = 6,620.46/x
  3. Step 3: Cross multiply
    10,142.90x = 15,192.82 × 6,620.46
  4. Step 4: Simplify right side
    10,142.90x = 100,583,413.89
  5. Step 5: Solve for x
    x = 100,583,413.89/10,142.90
  6. Step 6: Final answer
    x = 9,916.64

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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.