Home / 13,288.19-18,338.53-7,319.86

Finding the Fourth Proportional to 13,288.19, 18,338.53 and 7,319.86

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Solution

The fourth proportional to 13,288.19, 18,338.53 and 7,319.86 is: 10,101.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,288.19 : 18,338.53 = 7,319.86 : x
  2. Step 2: Convert to fraction form
    13,288.19/18,338.53 = 7,319.86/x
  3. Step 3: Cross multiply
    13,288.19x = 18,338.53 × 7,319.86
  4. Step 4: Simplify right side
    13,288.19x = 134,235,472.21
  5. Step 5: Solve for x
    x = 134,235,472.21/13,288.19
  6. Step 6: Final answer
    x = 10,101.86

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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.