Home / 11,299.40-15,576.84-7,931.72

Finding the Fourth Proportional to 11,299.40, 15,576.84 and 7,931.72

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Solution

The fourth proportional to 11,299.40, 15,576.84 and 7,931.72 is: 10,934.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,299.40 : 15,576.84 = 7,931.72 : x
  2. Step 2: Convert to fraction form
    11,299.40/15,576.84 = 7,931.72/x
  3. Step 3: Cross multiply
    11,299.40x = 15,576.84 × 7,931.72
  4. Step 4: Simplify right side
    11,299.40x = 123,551,133.36
  5. Step 5: Solve for x
    x = 123,551,133.36/11,299.40
  6. Step 6: Final answer
    x = 10,934.31

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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.