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Finding the Fourth Proportional to 19,239.79, 28,863.41 and 7,392.69

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Solution

The fourth proportional to 19,239.79, 28,863.41 and 7,392.69 is: 11,090.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,239.79 : 28,863.41 = 7,392.69 : x
  2. Step 2: Convert to fraction form
    19,239.79/28,863.41 = 7,392.69/x
  3. Step 3: Cross multiply
    19,239.79x = 28,863.41 × 7,392.69
  4. Step 4: Simplify right side
    19,239.79x = 213,378,242.47
  5. Step 5: Solve for x
    x = 213,378,242.47/19,239.79
  6. Step 6: Final answer
    x = 11,090.47

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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.