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Finding the Fourth Proportional to 19,166.63, 28,749.94 and 5,315.63

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Solution

The fourth proportional to 19,166.63, 28,749.94 and 5,315.63 is: 7,973.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,166.63 : 28,749.94 = 5,315.63 : x
  2. Step 2: Convert to fraction form
    19,166.63/28,749.94 = 5,315.63/x
  3. Step 3: Cross multiply
    19,166.63x = 28,749.94 × 5,315.63
  4. Step 4: Simplify right side
    19,166.63x = 152,823,886.52
  5. Step 5: Solve for x
    x = 152,823,886.52/19,166.63
  6. Step 6: Final answer
    x = 7,973.44

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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.