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Finding the Fourth Proportional to 13,888.64, 20,812.07 and 8,335.94

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Solution

The fourth proportional to 13,888.64, 20,812.07 and 8,335.94 is: 12,491.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,888.64 : 20,812.07 = 8,335.94 : x
  2. Step 2: Convert to fraction form
    13,888.64/20,812.07 = 8,335.94/x
  3. Step 3: Cross multiply
    13,888.64x = 20,812.07 × 8,335.94
  4. Step 4: Simplify right side
    13,888.64x = 173,488,083.58
  5. Step 5: Solve for x
    x = 173,488,083.58/13,888.64
  6. Step 6: Final answer
    x = 12,491.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.