Home / 21,686.67-29,928.33-12,255.84

Finding the Fourth Proportional to 21,686.67, 29,928.33 and 12,255.84

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Solution

The fourth proportional to 21,686.67, 29,928.33 and 12,255.84 is: 16,913.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,686.67 : 29,928.33 = 12,255.84 : x
  2. Step 2: Convert to fraction form
    21,686.67/29,928.33 = 12,255.84/x
  3. Step 3: Cross multiply
    21,686.67x = 29,928.33 × 12,255.84
  4. Step 4: Simplify right side
    21,686.67x = 366,796,823.95
  5. Step 5: Solve for x
    x = 366,796,823.95/21,686.67
  6. Step 6: Final answer
    x = 16,913.47

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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.