Home / 21,675.24-29,913.12-12,115.62

Finding the Fourth Proportional to 21,675.24, 29,913.12 and 12,115.62

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Solution

The fourth proportional to 21,675.24, 29,913.12 and 12,115.62 is: 16,720.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,675.24 : 29,913.12 = 12,115.62 : x
  2. Step 2: Convert to fraction form
    21,675.24/29,913.12 = 12,115.62/x
  3. Step 3: Cross multiply
    21,675.24x = 29,913.12 × 12,115.62
  4. Step 4: Simplify right side
    21,675.24x = 362,415,994.93
  5. Step 5: Solve for x
    x = 362,415,994.93/21,675.24
  6. Step 6: Final answer
    x = 16,720.28

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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.