Home / 12,881.21-17,776.46-7,215.94

Finding the Fourth Proportional to 12,881.21, 17,776.46 and 7,215.94

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Solution

The fourth proportional to 12,881.21, 17,776.46 and 7,215.94 is: 9,958.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,881.21 : 17,776.46 = 7,215.94 : x
  2. Step 2: Convert to fraction form
    12,881.21/17,776.46 = 7,215.94/x
  3. Step 3: Cross multiply
    12,881.21x = 17,776.46 × 7,215.94
  4. Step 4: Simplify right side
    12,881.21x = 128,273,959.03
  5. Step 5: Solve for x
    x = 128,273,959.03/12,881.21
  6. Step 6: Final answer
    x = 9,958.22

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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.