Home / 21,868.58-30,177.77-12,918.96

Finding the Fourth Proportional to 21,868.58, 30,177.77 and 12,918.96

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Solution

The fourth proportional to 21,868.58, 30,177.77 and 12,918.96 is: 17,827.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,868.58 : 30,177.77 = 12,918.96 : x
  2. Step 2: Convert to fraction form
    21,868.58/30,177.77 = 12,918.96/x
  3. Step 3: Cross multiply
    21,868.58x = 30,177.77 × 12,918.96
  4. Step 4: Simplify right side
    21,868.58x = 389,865,338.92
  5. Step 5: Solve for x
    x = 389,865,338.92/21,868.58
  6. Step 6: Final answer
    x = 17,827.65

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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.