Home / 21,408.84-29,543.94-13,455.72

Finding the Fourth Proportional to 21,408.84, 29,543.94 and 13,455.72

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Solution

The fourth proportional to 21,408.84, 29,543.94 and 13,455.72 is: 18,568.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,408.84 : 29,543.94 = 13,455.72 : x
  2. Step 2: Convert to fraction form
    21,408.84/29,543.94 = 13,455.72/x
  3. Step 3: Cross multiply
    21,408.84x = 29,543.94 × 13,455.72
  4. Step 4: Simplify right side
    21,408.84x = 397,534,984.34
  5. Step 5: Solve for x
    x = 397,534,984.34/21,408.84
  6. Step 6: Final answer
    x = 18,568.73

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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.