Home / 12,785.24-17,643.60-7,120.06

Finding the Fourth Proportional to 12,785.24, 17,643.60 and 7,120.06

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Solution

The fourth proportional to 12,785.24, 17,643.60 and 7,120.06 is: 9,825.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,785.24 : 17,643.60 = 7,120.06 : x
  2. Step 2: Convert to fraction form
    12,785.24/17,643.60 = 7,120.06/x
  3. Step 3: Cross multiply
    12,785.24x = 17,643.60 × 7,120.06
  4. Step 4: Simplify right side
    12,785.24x = 125,623,446.51
  5. Step 5: Solve for x
    x = 125,623,446.51/12,785.24
  6. Step 6: Final answer
    x = 9,825.66

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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.