Home / 9,869.15-13,619.40-5,619.99

Finding the Fourth Proportional to 9,869.15, 13,619.40 and 5,619.99

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Solution

The fourth proportional to 9,869.15, 13,619.40 and 5,619.99 is: 7,755.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,869.15 : 13,619.40 = 5,619.99 : x
  2. Step 2: Convert to fraction form
    9,869.15/13,619.40 = 5,619.99/x
  3. Step 3: Cross multiply
    9,869.15x = 13,619.40 × 5,619.99
  4. Step 4: Simplify right side
    9,869.15x = 76,540,891.81
  5. Step 5: Solve for x
    x = 76,540,891.81/9,869.15
  6. Step 6: Final answer
    x = 7,755.57

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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.