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Finding the Fourth Proportional to 13,989.93, 19,305.93 and 7,941.30

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Solution

The fourth proportional to 13,989.93, 19,305.93 and 7,941.30 is: 10,958.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,989.93 : 19,305.93 = 7,941.30 : x
  2. Step 2: Convert to fraction form
    13,989.93/19,305.93 = 7,941.30/x
  3. Step 3: Cross multiply
    13,989.93x = 19,305.93 × 7,941.30
  4. Step 4: Simplify right side
    13,989.93x = 153,314,181.91
  5. Step 5: Solve for x
    x = 153,314,181.91/13,989.93
  6. Step 6: Final answer
    x = 10,958.90

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Similar ratio
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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.