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Finding the Fourth Proportional to 14,889.44, 20,495.88 and 12,871.92

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Solution

The fourth proportional to 14,889.44, 20,495.88 and 12,871.92 is: 17,718.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,889.44 : 20,495.88 = 12,871.92 : x
  2. Step 2: Convert to fraction form
    14,889.44/20,495.88 = 12,871.92/x
  3. Step 3: Cross multiply
    14,889.44x = 20,495.88 × 12,871.92
  4. Step 4: Simplify right side
    14,889.44x = 263,821,327.69
  5. Step 5: Solve for x
    x = 263,821,327.69/14,889.44
  6. Step 6: Final answer
    x = 17,718.69

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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.