Home / 21,678.30-29,881.44-17,692.56

Finding the Fourth Proportional to 21,678.30, 29,881.44 and 17,692.56

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Solution

The fourth proportional to 21,678.30, 29,881.44 and 17,692.56 is: 24,387.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,678.30 : 29,881.44 = 17,692.56 : x
  2. Step 2: Convert to fraction form
    21,678.30/29,881.44 = 17,692.56/x
  3. Step 3: Cross multiply
    21,678.30x = 29,881.44 × 17,692.56
  4. Step 4: Simplify right side
    21,678.30x = 528,679,170.09
  5. Step 5: Solve for x
    x = 528,679,170.09/21,678.30
  6. Step 6: Final answer
    x = 24,387.48

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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.