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Finding the Fourth Proportional to 14,653.65, 20,220.78 and 8,603.25

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Solution

The fourth proportional to 14,653.65, 20,220.78 and 8,603.25 is: 11,871.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,653.65 : 20,220.78 = 8,603.25 : x
  2. Step 2: Convert to fraction form
    14,653.65/20,220.78 = 8,603.25/x
  3. Step 3: Cross multiply
    14,653.65x = 20,220.78 × 8,603.25
  4. Step 4: Simplify right side
    14,653.65x = 173,964,425.54
  5. Step 5: Solve for x
    x = 173,964,425.54/14,653.65
  6. Step 6: Final answer
    x = 11,871.75

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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.