Home / 18,915.10-26,074.84-12,108.12

Finding the Fourth Proportional to 18,915.10, 26,074.84 and 12,108.12

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Solution

The fourth proportional to 18,915.10, 26,074.84 and 12,108.12 is: 16,691.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,915.10 : 26,074.84 = 12,108.12 : x
  2. Step 2: Convert to fraction form
    18,915.10/26,074.84 = 12,108.12/x
  3. Step 3: Cross multiply
    18,915.10x = 26,074.84 × 12,108.12
  4. Step 4: Simplify right side
    18,915.10x = 315,717,231.16
  5. Step 5: Solve for x
    x = 315,717,231.16/18,915.10
  6. Step 6: Final answer
    x = 16,691.28

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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.