Home / 21,675.15-29,911.25-12,115.19

Finding the Fourth Proportional to 21,675.15, 29,911.25 and 12,115.19

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Solution

The fourth proportional to 21,675.15, 29,911.25 and 12,115.19 is: 16,718.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,675.15 : 29,911.25 = 12,115.19 : x
  2. Step 2: Convert to fraction form
    21,675.15/29,911.25 = 12,115.19/x
  3. Step 3: Cross multiply
    21,675.15x = 29,911.25 × 12,115.19
  4. Step 4: Simplify right side
    21,675.15x = 362,380,266.76
  5. Step 5: Solve for x
    x = 362,380,266.76/21,675.15
  6. Step 6: Final answer
    x = 16,718.70

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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.