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Finding the Fourth Proportional to 19,659.98, 29,489.79 and 7,970.42

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Solution

The fourth proportional to 19,659.98, 29,489.79 and 7,970.42 is: 11,955.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,659.98 : 29,489.79 = 7,970.42 : x
  2. Step 2: Convert to fraction form
    19,659.98/29,489.79 = 7,970.42/x
  3. Step 3: Cross multiply
    19,659.98x = 29,489.79 × 7,970.42
  4. Step 4: Simplify right side
    19,659.98x = 235,046,012.01
  5. Step 5: Solve for x
    x = 235,046,012.01/19,659.98
  6. Step 6: Final answer
    x = 11,955.56

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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.