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Finding the Fourth Proportional to 14,293.95, 19,725.36 and 7,920.49

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Solution

The fourth proportional to 14,293.95, 19,725.36 and 7,920.49 is: 10,930.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,293.95 : 19,725.36 = 7,920.49 : x
  2. Step 2: Convert to fraction form
    14,293.95/19,725.36 = 7,920.49/x
  3. Step 3: Cross multiply
    14,293.95x = 19,725.36 × 7,920.49
  4. Step 4: Simplify right side
    14,293.95x = 156,234,504.30
  5. Step 5: Solve for x
    x = 156,234,504.30/14,293.95
  6. Step 6: Final answer
    x = 10,930.11

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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.