Home / 13,147.24-18,143.34-7,178.98

Finding the Fourth Proportional to 13,147.24, 18,143.34 and 7,178.98

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Solution

The fourth proportional to 13,147.24, 18,143.34 and 7,178.98 is: 9,907.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,147.24 : 18,143.34 = 7,178.98 : x
  2. Step 2: Convert to fraction form
    13,147.24/18,143.34 = 7,178.98/x
  3. Step 3: Cross multiply
    13,147.24x = 18,143.34 × 7,178.98
  4. Step 4: Simplify right side
    13,147.24x = 130,250,674.99
  5. Step 5: Solve for x
    x = 130,250,674.99/13,147.24
  6. Step 6: Final answer
    x = 9,907.07

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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.