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Finding the Fourth Proportional to 30,300.80, 45,413.40 and 15,515.60

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Solution

The fourth proportional to 30,300.80, 45,413.40 and 15,515.60 is: 23,254.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,300.80 : 45,413.40 = 15,515.60 : x
  2. Step 2: Convert to fraction form
    30,300.80/45,413.40 = 15,515.60/x
  3. Step 3: Cross multiply
    30,300.80x = 45,413.40 × 15,515.60
  4. Step 4: Simplify right side
    30,300.80x = 704,616,149.04
  5. Step 5: Solve for x
    x = 704,616,149.04/30,300.80
  6. Step 6: Final answer
    x = 23,254.04

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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.