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Finding the Fourth Proportional to 14,615.94, 20,172.52 and 14,129.94

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Solution

The fourth proportional to 14,615.94, 20,172.52 and 14,129.94 is: 19,501.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,615.94 : 20,172.52 = 14,129.94 : x
  2. Step 2: Convert to fraction form
    14,615.94/20,172.52 = 14,129.94/x
  3. Step 3: Cross multiply
    14,615.94x = 20,172.52 × 14,129.94
  4. Step 4: Simplify right side
    14,615.94x = 285,036,497.25
  5. Step 5: Solve for x
    x = 285,036,497.25/14,615.94
  6. Step 6: Final answer
    x = 19,501.76

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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.