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Finding the Fourth Proportional to 15,391, 23,092.26 and 7,990.84

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Solution

The fourth proportional to 15,391, 23,092.26 and 7,990.84 is: 11,989.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,391 : 23,092.26 = 7,990.84 : x
  2. Step 2: Convert to fraction form
    15,391/23,092.26 = 7,990.84/x
  3. Step 3: Cross multiply
    15,391x = 23,092.26 × 7,990.84
  4. Step 4: Simplify right side
    15,391x = 184,526,554.90
  5. Step 5: Solve for x
    x = 184,526,554.90/15,391
  6. Step 6: Final answer
    x = 11,989.25

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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.