Home / 12,455.19-17,189.36-7,922.64

Finding the Fourth Proportional to 12,455.19, 17,189.36 and 7,922.64

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Solution

The fourth proportional to 12,455.19, 17,189.36 and 7,922.64 is: 10,934.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,455.19 : 17,189.36 = 7,922.64 : x
  2. Step 2: Convert to fraction form
    12,455.19/17,189.36 = 7,922.64/x
  3. Step 3: Cross multiply
    12,455.19x = 17,189.36 × 7,922.64
  4. Step 4: Simplify right side
    12,455.19x = 136,185,065.20
  5. Step 5: Solve for x
    x = 136,185,065.20/12,455.19
  6. Step 6: Final answer
    x = 10,934.00

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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.