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Finding the Fourth Proportional to 15,115, 20,857.26 and 14,000.44

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Solution

The fourth proportional to 15,115, 20,857.26 and 14,000.44 is: 19,319.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,115 : 20,857.26 = 14,000.44 : x
  2. Step 2: Convert to fraction form
    15,115/20,857.26 = 14,000.44/x
  3. Step 3: Cross multiply
    15,115x = 20,857.26 × 14,000.44
  4. Step 4: Simplify right side
    15,115x = 292,010,817.19
  5. Step 5: Solve for x
    x = 292,010,817.19/15,115
  6. Step 6: Final answer
    x = 19,319.27

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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.