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Finding the Fourth Proportional to 13,890.16, 20,825.98 and 7,653.10

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Solution

The fourth proportional to 13,890.16, 20,825.98 and 7,653.10 is: 11,474.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,890.16 : 20,825.98 = 7,653.10 : x
  2. Step 2: Convert to fraction form
    13,890.16/20,825.98 = 7,653.10/x
  3. Step 3: Cross multiply
    13,890.16x = 20,825.98 × 7,653.10
  4. Step 4: Simplify right side
    13,890.16x = 159,383,307.54
  5. Step 5: Solve for x
    x = 159,383,307.54/13,890.16
  6. Step 6: Final answer
    x = 11,474.55

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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.