Home / 13,878.09-19,151.91-7,909.74

Finding the Fourth Proportional to 13,878.09, 19,151.91 and 7,909.74

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Solution

The fourth proportional to 13,878.09, 19,151.91 and 7,909.74 is: 10,915.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,878.09 : 19,151.91 = 7,909.74 : x
  2. Step 2: Convert to fraction form
    13,878.09/19,151.91 = 7,909.74/x
  3. Step 3: Cross multiply
    13,878.09x = 19,151.91 × 7,909.74
  4. Step 4: Simplify right side
    13,878.09x = 151,486,628.60
  5. Step 5: Solve for x
    x = 151,486,628.60/13,878.09
  6. Step 6: Final answer
    x = 10,915.52

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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.