Home / 21,519.95-29,692.67-13,021.86

Finding the Fourth Proportional to 21,519.95, 29,692.67 and 13,021.86

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Solution

The fourth proportional to 21,519.95, 29,692.67 and 13,021.86 is: 17,967.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,519.95 : 29,692.67 = 13,021.86 : x
  2. Step 2: Convert to fraction form
    21,519.95/29,692.67 = 13,021.86/x
  3. Step 3: Cross multiply
    21,519.95x = 29,692.67 × 13,021.86
  4. Step 4: Simplify right side
    21,519.95x = 386,653,791.77
  5. Step 5: Solve for x
    x = 386,653,791.77/21,519.95
  6. Step 6: Final answer
    x = 17,967.23

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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.