Home / 15,391.60-23,088.12-7,991.38

Finding the Fourth Proportional to 15,391.60, 23,088.12 and 7,991.38

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Solution

The fourth proportional to 15,391.60, 23,088.12 and 7,991.38 is: 11,987.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,391.60 : 23,088.12 = 7,991.38 : x
  2. Step 2: Convert to fraction form
    15,391.60/23,088.12 = 7,991.38/x
  3. Step 3: Cross multiply
    15,391.60x = 23,088.12 × 7,991.38
  4. Step 4: Simplify right side
    15,391.60x = 184,505,940.41
  5. Step 5: Solve for x
    x = 184,505,940.41/15,391.60
  6. Step 6: Final answer
    x = 11,987.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.