Home / 13,288.20-18,338.55-7,319.86

Finding the Fourth Proportional to 13,288.20, 18,338.55 and 7,319.86

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Solution

The fourth proportional to 13,288.20, 18,338.55 and 7,319.86 is: 10,101.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,288.20 : 18,338.55 = 7,319.86 : x
  2. Step 2: Convert to fraction form
    13,288.20/18,338.55 = 7,319.86/x
  3. Step 3: Cross multiply
    13,288.20x = 18,338.55 × 7,319.86
  4. Step 4: Simplify right side
    13,288.20x = 134,235,582.00
  5. Step 5: Solve for x
    x = 134,235,582.00/13,288.20
  6. Step 6: Final answer
    x = 10,101.87

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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.