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Finding the Fourth Proportional to 14,251.68, 21,368.16 and 4,387.68

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Solution

The fourth proportional to 14,251.68, 21,368.16 and 4,387.68 is: 6,578.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,251.68 : 21,368.16 = 4,387.68 : x
  2. Step 2: Convert to fraction form
    14,251.68/21,368.16 = 4,387.68/x
  3. Step 3: Cross multiply
    14,251.68x = 21,368.16 × 4,387.68
  4. Step 4: Simplify right side
    14,251.68x = 93,756,648.27
  5. Step 5: Solve for x
    x = 93,756,648.27/14,251.68
  6. Step 6: Final answer
    x = 6,578.64

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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.