Home / 22,455.12-30,985.68-12,382.90

Finding the Fourth Proportional to 22,455.12, 30,985.68 and 12,382.90

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Solution

The fourth proportional to 22,455.12, 30,985.68 and 12,382.90 is: 17,087.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,455.12 : 30,985.68 = 12,382.90 : x
  2. Step 2: Convert to fraction form
    22,455.12/30,985.68 = 12,382.90/x
  3. Step 3: Cross multiply
    22,455.12x = 30,985.68 × 12,382.90
  4. Step 4: Simplify right side
    22,455.12x = 383,692,576.87
  5. Step 5: Solve for x
    x = 383,692,576.87/22,455.12
  6. Step 6: Final answer
    x = 17,087.09

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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.