Home / 12,785.75-17,639.35-9,427.34

Finding the Fourth Proportional to 12,785.75, 17,639.35 and 9,427.34

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Solution

The fourth proportional to 12,785.75, 17,639.35 and 9,427.34 is: 13,006.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,785.75 : 17,639.35 = 9,427.34 : x
  2. Step 2: Convert to fraction form
    12,785.75/17,639.35 = 9,427.34/x
  3. Step 3: Cross multiply
    12,785.75x = 17,639.35 × 9,427.34
  4. Step 4: Simplify right side
    12,785.75x = 166,292,104.28
  5. Step 5: Solve for x
    x = 166,292,104.28/12,785.75
  6. Step 6: Final answer
    x = 13,006.05

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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.