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Finding the Fourth Proportional to 19,308.87, 28,963.58 and 5,457.87

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Solution

The fourth proportional to 19,308.87, 28,963.58 and 5,457.87 is: 8,186.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,308.87 : 28,963.58 = 5,457.87 : x
  2. Step 2: Convert to fraction form
    19,308.87/28,963.58 = 5,457.87/x
  3. Step 3: Cross multiply
    19,308.87x = 28,963.58 × 5,457.87
  4. Step 4: Simplify right side
    19,308.87x = 158,079,427.09
  5. Step 5: Solve for x
    x = 158,079,427.09/19,308.87
  6. Step 6: Final answer
    x = 8,186.88

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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.