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Finding the Fourth Proportional to 14,643.79, 20,208.49 and 7,929.42

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Solution

The fourth proportional to 14,643.79, 20,208.49 and 7,929.42 is: 10,942.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,643.79 : 20,208.49 = 7,929.42 : x
  2. Step 2: Convert to fraction form
    14,643.79/20,208.49 = 7,929.42/x
  3. Step 3: Cross multiply
    14,643.79x = 20,208.49 × 7,929.42
  4. Step 4: Simplify right side
    14,643.79x = 160,241,584.95
  5. Step 5: Solve for x
    x = 160,241,584.95/14,643.79
  6. Step 6: Final answer
    x = 10,942.63

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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.