Home / 15,387.91-21,230.60-9,413.35

Finding the Fourth Proportional to 15,387.91, 21,230.60 and 9,413.35

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Solution

The fourth proportional to 15,387.91, 21,230.60 and 9,413.35 is: 12,987.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,387.91 : 21,230.60 = 9,413.35 : x
  2. Step 2: Convert to fraction form
    15,387.91/21,230.60 = 9,413.35/x
  3. Step 3: Cross multiply
    15,387.91x = 21,230.60 × 9,413.35
  4. Step 4: Simplify right side
    15,387.91x = 199,851,021.44
  5. Step 5: Solve for x
    x = 199,851,021.44/15,387.91
  6. Step 6: Final answer
    x = 12,987.54

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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.