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Finding the Fourth Proportional to 19,777.65, 29,666.48 and 6,639.26

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Solution

The fourth proportional to 19,777.65, 29,666.48 and 6,639.26 is: 9,958.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,777.65 : 29,666.48 = 6,639.26 : x
  2. Step 2: Convert to fraction form
    19,777.65/29,666.48 = 6,639.26/x
  3. Step 3: Cross multiply
    19,777.65x = 29,666.48 × 6,639.26
  4. Step 4: Simplify right side
    19,777.65x = 196,963,292.48
  5. Step 5: Solve for x
    x = 196,963,292.48/19,777.65
  6. Step 6: Final answer
    x = 9,958.88

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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.