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Finding the Fourth Proportional to 21,372.71, 29,494.32 and 11,813.32

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Solution

The fourth proportional to 21,372.71, 29,494.32 and 11,813.32 is: 16,302.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,372.71 : 29,494.32 = 11,813.32 : x
  2. Step 2: Convert to fraction form
    21,372.71/29,494.32 = 11,813.32/x
  3. Step 3: Cross multiply
    21,372.71x = 29,494.32 × 11,813.32
  4. Step 4: Simplify right side
    21,372.71x = 348,425,840.34
  5. Step 5: Solve for x
    x = 348,425,840.34/21,372.71
  6. Step 6: Final answer
    x = 16,302.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.