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Finding the Fourth Proportional to 21,302.72, 31,953.89 and 5,506.39

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Solution

The fourth proportional to 21,302.72, 31,953.89 and 5,506.39 is: 8,259.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,302.72 : 31,953.89 = 5,506.39 : x
  2. Step 2: Convert to fraction form
    21,302.72/31,953.89 = 5,506.39/x
  3. Step 3: Cross multiply
    21,302.72x = 31,953.89 × 5,506.39
  4. Step 4: Simplify right side
    21,302.72x = 175,950,580.36
  5. Step 5: Solve for x
    x = 175,950,580.36/21,302.72
  6. Step 6: Final answer
    x = 8,259.54

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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.