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Finding the Fourth Proportional to 14,615.78, 21,918.27 and 5,253.28

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Solution

The fourth proportional to 14,615.78, 21,918.27 and 5,253.28 is: 7,877.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,615.78 : 21,918.27 = 5,253.28 : x
  2. Step 2: Convert to fraction form
    14,615.78/21,918.27 = 5,253.28/x
  3. Step 3: Cross multiply
    14,615.78x = 21,918.27 × 5,253.28
  4. Step 4: Simplify right side
    14,615.78x = 115,142,809.43
  5. Step 5: Solve for x
    x = 115,142,809.43/14,615.78
  6. Step 6: Final answer
    x = 7,877.98

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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.