Home / 12,638.32-17,431.48-9,280.08

Finding the Fourth Proportional to 12,638.32, 17,431.48 and 9,280.08

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Solution

The fourth proportional to 12,638.32, 17,431.48 and 9,280.08 is: 12,799.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,638.32 : 17,431.48 = 9,280.08 : x
  2. Step 2: Convert to fraction form
    12,638.32/17,431.48 = 9,280.08/x
  3. Step 3: Cross multiply
    12,638.32x = 17,431.48 × 9,280.08
  4. Step 4: Simplify right side
    12,638.32x = 161,765,528.92
  5. Step 5: Solve for x
    x = 161,765,528.92/12,638.32
  6. Step 6: Final answer
    x = 12,799.61

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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.