Home / 27,990.80-38,625.53-15,415.55

Finding the Fourth Proportional to 27,990.80, 38,625.53 and 15,415.55

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Solution

The fourth proportional to 27,990.80, 38,625.53 and 15,415.55 is: 21,272.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,990.80 : 38,625.53 = 15,415.55 : x
  2. Step 2: Convert to fraction form
    27,990.80/38,625.53 = 15,415.55/x
  3. Step 3: Cross multiply
    27,990.80x = 38,625.53 × 15,415.55
  4. Step 4: Simplify right side
    27,990.80x = 595,433,518.79
  5. Step 5: Solve for x
    x = 595,433,518.79/27,990.80
  6. Step 6: Final answer
    x = 21,272.48

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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.