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Finding the Fourth Proportional to 14,615.63, 21,921.01 and 5,253.75

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Solution

The fourth proportional to 14,615.63, 21,921.01 and 5,253.75 is: 7,879.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,615.63 : 21,921.01 = 5,253.75 : x
  2. Step 2: Convert to fraction form
    14,615.63/21,921.01 = 5,253.75/x
  3. Step 3: Cross multiply
    14,615.63x = 21,921.01 × 5,253.75
  4. Step 4: Simplify right side
    14,615.63x = 115,167,506.29
  5. Step 5: Solve for x
    x = 115,167,506.29/14,615.63
  6. Step 6: Final answer
    x = 7,879.75

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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.