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Finding the Fourth Proportional to 21,567, 29,745.84 and 18,909.96

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Solution

The fourth proportional to 21,567, 29,745.84 and 18,909.96 is: 26,081.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,567 : 29,745.84 = 18,909.96 : x
  2. Step 2: Convert to fraction form
    21,567/29,745.84 = 18,909.96/x
  3. Step 3: Cross multiply
    21,567x = 29,745.84 × 18,909.96
  4. Step 4: Simplify right side
    21,567x = 562,492,644.57
  5. Step 5: Solve for x
    x = 562,492,644.57/21,567
  6. Step 6: Final answer
    x = 26,081.17

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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.