Home / 7,715.28-10,647.10-4,178.50

Finding the Fourth Proportional to 7,715.28, 10,647.10 and 4,178.50

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Solution

The fourth proportional to 7,715.28, 10,647.10 and 4,178.50 is: 5,766.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,715.28 : 10,647.10 = 4,178.50 : x
  2. Step 2: Convert to fraction form
    7,715.28/10,647.10 = 4,178.50/x
  3. Step 3: Cross multiply
    7,715.28x = 10,647.10 × 4,178.50
  4. Step 4: Simplify right side
    7,715.28x = 44,488,907.35
  5. Step 5: Solve for x
    x = 44,488,907.35/7,715.28
  6. Step 6: Final answer
    x = 5,766.34

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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.