Home / 12,886.87-17,785.13-7,222.58

Finding the Fourth Proportional to 12,886.87, 17,785.13 and 7,222.58

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Solution

The fourth proportional to 12,886.87, 17,785.13 and 7,222.58 is: 9,967.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,886.87 : 17,785.13 = 7,222.58 : x
  2. Step 2: Convert to fraction form
    12,886.87/17,785.13 = 7,222.58/x
  3. Step 3: Cross multiply
    12,886.87x = 17,785.13 × 7,222.58
  4. Step 4: Simplify right side
    12,886.87x = 128,454,399.20
  5. Step 5: Solve for x
    x = 128,454,399.20/12,886.87
  6. Step 6: Final answer
    x = 9,967.85

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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.