Home / 21,571.55-29,762.91-12,621.24

Finding the Fourth Proportional to 21,571.55, 29,762.91 and 12,621.24

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Solution

The fourth proportional to 21,571.55, 29,762.91 and 12,621.24 is: 17,413.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,571.55 : 29,762.91 = 12,621.24 : x
  2. Step 2: Convert to fraction form
    21,571.55/29,762.91 = 12,621.24/x
  3. Step 3: Cross multiply
    21,571.55x = 29,762.91 × 12,621.24
  4. Step 4: Simplify right side
    21,571.55x = 375,644,830.21
  5. Step 5: Solve for x
    x = 375,644,830.21/21,571.55
  6. Step 6: Final answer
    x = 17,413.90

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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.