Home / 15,185.86-20,955.47-9,520.38

Finding the Fourth Proportional to 15,185.86, 20,955.47 and 9,520.38

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Solution

The fourth proportional to 15,185.86, 20,955.47 and 9,520.38 is: 13,137.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,185.86 : 20,955.47 = 9,520.38 : x
  2. Step 2: Convert to fraction form
    15,185.86/20,955.47 = 9,520.38/x
  3. Step 3: Cross multiply
    15,185.86x = 20,955.47 × 9,520.38
  4. Step 4: Simplify right side
    15,185.86x = 199,503,989.88
  5. Step 5: Solve for x
    x = 199,503,989.88/15,185.86
  6. Step 6: Final answer
    x = 13,137.49

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Double scale
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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.