Home / 21,561.40-29,754.98-11,871.95

Finding the Fourth Proportional to 21,561.40, 29,754.98 and 11,871.95

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Solution

The fourth proportional to 21,561.40, 29,754.98 and 11,871.95 is: 16,383.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,561.40 : 29,754.98 = 11,871.95 : x
  2. Step 2: Convert to fraction form
    21,561.40/29,754.98 = 11,871.95/x
  3. Step 3: Cross multiply
    21,561.40x = 29,754.98 × 11,871.95
  4. Step 4: Simplify right side
    21,561.40x = 353,249,426.68
  5. Step 5: Solve for x
    x = 353,249,426.68/21,561.40
  6. Step 6: Final answer
    x = 16,383.42

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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.