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Finding the Fourth Proportional to 14,429.50, 19,912.75 and 7,805.50

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Solution

The fourth proportional to 14,429.50, 19,912.75 and 7,805.50 is: 10,771.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,429.50 : 19,912.75 = 7,805.50 : x
  2. Step 2: Convert to fraction form
    14,429.50/19,912.75 = 7,805.50/x
  3. Step 3: Cross multiply
    14,429.50x = 19,912.75 × 7,805.50
  4. Step 4: Simplify right side
    14,429.50x = 155,428,970.13
  5. Step 5: Solve for x
    x = 155,428,970.13/14,429.50
  6. Step 6: Final answer
    x = 10,771.61

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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.