Home / 15,638.88-21,567.12-12,236.40

Finding the Fourth Proportional to 15,638.88, 21,567.12 and 12,236.40

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Solution

The fourth proportional to 15,638.88, 21,567.12 and 12,236.40 is: 16,874.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,638.88 : 21,567.12 = 12,236.40 : x
  2. Step 2: Convert to fraction form
    15,638.88/21,567.12 = 12,236.40/x
  3. Step 3: Cross multiply
    15,638.88x = 21,567.12 × 12,236.40
  4. Step 4: Simplify right side
    15,638.88x = 263,903,907.17
  5. Step 5: Solve for x
    x = 263,903,907.17/15,638.88
  6. Step 6: Final answer
    x = 16,874.86

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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.