Home / 9,139.19-13,708.79-2,213.69

Finding the Fourth Proportional to 9,139.19, 13,708.79 and 2,213.69

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Solution

The fourth proportional to 9,139.19, 13,708.79 and 2,213.69 is: 3,320.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,139.19 : 13,708.79 = 2,213.69 : x
  2. Step 2: Convert to fraction form
    9,139.19/13,708.79 = 2,213.69/x
  3. Step 3: Cross multiply
    9,139.19x = 13,708.79 × 2,213.69
  4. Step 4: Simplify right side
    9,139.19x = 30,346,931.72
  5. Step 5: Solve for x
    x = 30,346,931.72/9,139.19
  6. Step 6: Final answer
    x = 3,320.53

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.