Home / 13,878.88-19,154.68-7,909.18

Finding the Fourth Proportional to 13,878.88, 19,154.68 and 7,909.18

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Solution

The fourth proportional to 13,878.88, 19,154.68 and 7,909.18 is: 10,915.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,878.88 : 19,154.68 = 7,909.18 : x
  2. Step 2: Convert to fraction form
    13,878.88/19,154.68 = 7,909.18/x
  3. Step 3: Cross multiply
    13,878.88x = 19,154.68 × 7,909.18
  4. Step 4: Simplify right side
    13,878.88x = 151,497,811.96
  5. Step 5: Solve for x
    x = 151,497,811.96/13,878.88
  6. Step 6: Final answer
    x = 10,915.71

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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.