Home / 12,945.21-17,865.04-7,281.74

Finding the Fourth Proportional to 12,945.21, 17,865.04 and 7,281.74

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Solution

The fourth proportional to 12,945.21, 17,865.04 and 7,281.74 is: 10,049.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,945.21 : 17,865.04 = 7,281.74 : x
  2. Step 2: Convert to fraction form
    12,945.21/17,865.04 = 7,281.74/x
  3. Step 3: Cross multiply
    12,945.21x = 17,865.04 × 7,281.74
  4. Step 4: Simplify right side
    12,945.21x = 130,088,576.37
  5. Step 5: Solve for x
    x = 130,088,576.37/12,945.21
  6. Step 6: Final answer
    x = 10,049.17

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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.