Home / 7,715.40-11,573.28-2,785.44

Finding the Fourth Proportional to 7,715.40, 11,573.28 and 2,785.44

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Solution

The fourth proportional to 7,715.40, 11,573.28 and 2,785.44 is: 4,178.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,715.40 : 11,573.28 = 2,785.44 : x
  2. Step 2: Convert to fraction form
    7,715.40/11,573.28 = 2,785.44/x
  3. Step 3: Cross multiply
    7,715.40x = 11,573.28 × 2,785.44
  4. Step 4: Simplify right side
    7,715.40x = 32,236,677.04
  5. Step 5: Solve for x
    x = 32,236,677.04/7,715.40
  6. Step 6: Final answer
    x = 4,178.22

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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.