Home / 11,838.20-17,741.10-7,878.20

Finding the Fourth Proportional to 11,838.20, 17,741.10 and 7,878.20

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Solution

The fourth proportional to 11,838.20, 17,741.10 and 7,878.20 is: 11,806.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,838.20 : 17,741.10 = 7,878.20 : x
  2. Step 2: Convert to fraction form
    11,838.20/17,741.10 = 7,878.20/x
  3. Step 3: Cross multiply
    11,838.20x = 17,741.10 × 7,878.20
  4. Step 4: Simplify right side
    11,838.20x = 139,767,934.02
  5. Step 5: Solve for x
    x = 139,767,934.02/11,838.20
  6. Step 6: Final answer
    x = 11,806.52

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.