Home / 7,715.39-10,647.27-4,178.57

Finding the Fourth Proportional to 7,715.39, 10,647.27 and 4,178.57

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Solution

The fourth proportional to 7,715.39, 10,647.27 and 4,178.57 is: 5,766.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,715.39 : 10,647.27 = 4,178.57 : x
  2. Step 2: Convert to fraction form
    7,715.39/10,647.27 = 4,178.57/x
  3. Step 3: Cross multiply
    7,715.39x = 10,647.27 × 4,178.57
  4. Step 4: Simplify right side
    7,715.39x = 44,490,309.77
  5. Step 5: Solve for x
    x = 44,490,309.77/7,715.39
  6. Step 6: Final answer
    x = 5,766.44

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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.