Home / 21,579.48-29,780.10-13,079.52

Finding the Fourth Proportional to 21,579.48, 29,780.10 and 13,079.52

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Solution

The fourth proportional to 21,579.48, 29,780.10 and 13,079.52 is: 18,049.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,579.48 : 29,780.10 = 13,079.52 : x
  2. Step 2: Convert to fraction form
    21,579.48/29,780.10 = 13,079.52/x
  3. Step 3: Cross multiply
    21,579.48x = 29,780.10 × 13,079.52
  4. Step 4: Simplify right side
    21,579.48x = 389,509,413.55
  5. Step 5: Solve for x
    x = 389,509,413.55/21,579.48
  6. Step 6: Final answer
    x = 18,049.99

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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.