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Finding the Fourth Proportional to 14,615.56, 20,171.19 and 14,156.29

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Solution

The fourth proportional to 14,615.56, 20,171.19 and 14,156.29 is: 19,537.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,615.56 : 20,171.19 = 14,156.29 : x
  2. Step 2: Convert to fraction form
    14,615.56/20,171.19 = 14,156.29/x
  3. Step 3: Cross multiply
    14,615.56x = 20,171.19 × 14,156.29
  4. Step 4: Simplify right side
    14,615.56x = 285,549,215.29
  5. Step 5: Solve for x
    x = 285,549,215.29/14,615.56
  6. Step 6: Final answer
    x = 19,537.34

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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.