Home / 21,245.80-29,302.98-13,692.88

Finding the Fourth Proportional to 21,245.80, 29,302.98 and 13,692.88

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Solution

The fourth proportional to 21,245.80, 29,302.98 and 13,692.88 is: 18,885.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,245.80 : 29,302.98 = 13,692.88 : x
  2. Step 2: Convert to fraction form
    21,245.80/29,302.98 = 13,692.88/x
  3. Step 3: Cross multiply
    21,245.80x = 29,302.98 × 13,692.88
  4. Step 4: Simplify right side
    21,245.80x = 401,242,188.78
  5. Step 5: Solve for x
    x = 401,242,188.78/21,245.80
  6. Step 6: Final answer
    x = 18,885.72

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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.