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Finding the Fourth Proportional to 13,958.90, 19,264.25 and 7,909.09

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Solution

The fourth proportional to 13,958.90, 19,264.25 and 7,909.09 is: 10,915.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,958.90 : 19,264.25 = 7,909.09 : x
  2. Step 2: Convert to fraction form
    13,958.90/19,264.25 = 7,909.09/x
  3. Step 3: Cross multiply
    13,958.90x = 19,264.25 × 7,909.09
  4. Step 4: Simplify right side
    13,958.90x = 152,362,658.64
  5. Step 5: Solve for x
    x = 152,362,658.64/13,958.90
  6. Step 6: Final answer
    x = 10,915.09

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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.