Home / 7,114.87-9,819.06-3,928.77

Finding the Fourth Proportional to 7,114.87, 9,819.06 and 3,928.77

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Solution

The fourth proportional to 7,114.87, 9,819.06 and 3,928.77 is: 5,422.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,114.87 : 9,819.06 = 3,928.77 : x
  2. Step 2: Convert to fraction form
    7,114.87/9,819.06 = 3,928.77/x
  3. Step 3: Cross multiply
    7,114.87x = 9,819.06 × 3,928.77
  4. Step 4: Simplify right side
    7,114.87x = 38,576,808.71
  5. Step 5: Solve for x
    x = 38,576,808.71/7,114.87
  6. Step 6: Final answer
    x = 5,422.00

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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.