Home / 12,785.32-17,642.70-7,119.64

Finding the Fourth Proportional to 12,785.32, 17,642.70 and 7,119.64

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Solution

The fourth proportional to 12,785.32, 17,642.70 and 7,119.64 is: 9,824.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,785.32 : 17,642.70 = 7,119.64 : x
  2. Step 2: Convert to fraction form
    12,785.32/17,642.70 = 7,119.64/x
  3. Step 3: Cross multiply
    12,785.32x = 17,642.70 × 7,119.64
  4. Step 4: Simplify right side
    12,785.32x = 125,609,672.63
  5. Step 5: Solve for x
    x = 125,609,672.63/12,785.32
  6. Step 6: Final answer
    x = 9,824.52

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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.