Home / 21,675.95-29,912.73-12,115.83

Finding the Fourth Proportional to 21,675.95, 29,912.73 and 12,115.83

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Solution

The fourth proportional to 21,675.95, 29,912.73 and 12,115.83 is: 16,719.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,675.95 : 29,912.73 = 12,115.83 : x
  2. Step 2: Convert to fraction form
    21,675.95/29,912.73 = 12,115.83/x
  3. Step 3: Cross multiply
    21,675.95x = 29,912.73 × 12,115.83
  4. Step 4: Simplify right side
    21,675.95x = 362,417,595.75
  5. Step 5: Solve for x
    x = 362,417,595.75/21,675.95
  6. Step 6: Final answer
    x = 16,719.80

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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.