Home / 7,880.76-11,821.14-2,686.50

Finding the Fourth Proportional to 7,880.76, 11,821.14 and 2,686.50

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Solution

The fourth proportional to 7,880.76, 11,821.14 and 2,686.50 is: 4,029.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,880.76 : 11,821.14 = 2,686.50 : x
  2. Step 2: Convert to fraction form
    7,880.76/11,821.14 = 2,686.50/x
  3. Step 3: Cross multiply
    7,880.76x = 11,821.14 × 2,686.50
  4. Step 4: Simplify right side
    7,880.76x = 31,757,492.61
  5. Step 5: Solve for x
    x = 31,757,492.61/7,880.76
  6. Step 6: Final answer
    x = 4,029.75

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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.