Home / 12,827.96-17,707.38-9,989.72

Finding the Fourth Proportional to 12,827.96, 17,707.38 and 9,989.72

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Solution

The fourth proportional to 12,827.96, 17,707.38 and 9,989.72 is: 13,789.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,827.96 : 17,707.38 = 9,989.72 : x
  2. Step 2: Convert to fraction form
    12,827.96/17,707.38 = 9,989.72/x
  3. Step 3: Cross multiply
    12,827.96x = 17,707.38 × 9,989.72
  4. Step 4: Simplify right side
    12,827.96x = 176,891,768.13
  5. Step 5: Solve for x
    x = 176,891,768.13/12,827.96
  6. Step 6: Final answer
    x = 13,789.55

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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.