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Finding the Fourth Proportional to 21,562.88, 29,764.64 and 13,610.32

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Solution

The fourth proportional to 21,562.88, 29,764.64 and 13,610.32 is: 18,787.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,562.88 : 29,764.64 = 13,610.32 : x
  2. Step 2: Convert to fraction form
    21,562.88/29,764.64 = 13,610.32/x
  3. Step 3: Cross multiply
    21,562.88x = 29,764.64 × 13,610.32
  4. Step 4: Simplify right side
    21,562.88x = 405,106,275.08
  5. Step 5: Solve for x
    x = 405,106,275.08/21,562.88
  6. Step 6: Final answer
    x = 18,787.21

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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.