Home / 7,715.45-10,647.20-4,178.63

Finding the Fourth Proportional to 7,715.45, 10,647.20 and 4,178.63

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Solution

The fourth proportional to 7,715.45, 10,647.20 and 4,178.63 is: 5,766.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,715.45 : 10,647.20 = 4,178.63 : x
  2. Step 2: Convert to fraction form
    7,715.45/10,647.20 = 4,178.63/x
  3. Step 3: Cross multiply
    7,715.45x = 10,647.20 × 4,178.63
  4. Step 4: Simplify right side
    7,715.45x = 44,490,688.44
  5. Step 5: Solve for x
    x = 44,490,688.44/7,715.45
  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.