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Finding the Fourth Proportional to 14,435.13, 19,920.11 and 8,147.46

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Solution

The fourth proportional to 14,435.13, 19,920.11 and 8,147.46 is: 11,243.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,435.13 : 19,920.11 = 8,147.46 : x
  2. Step 2: Convert to fraction form
    14,435.13/19,920.11 = 8,147.46/x
  3. Step 3: Cross multiply
    14,435.13x = 19,920.11 × 8,147.46
  4. Step 4: Simplify right side
    14,435.13x = 162,298,258.68
  5. Step 5: Solve for x
    x = 162,298,258.68/14,435.13
  6. Step 6: Final answer
    x = 11,243.28

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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.