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Finding the Fourth Proportional to 10,640.88, 15,931.08 and 7,167.60

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Solution

The fourth proportional to 10,640.88, 15,931.08 and 7,167.60 is: 10,731.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,640.88 : 15,931.08 = 7,167.60 : x
  2. Step 2: Convert to fraction form
    10,640.88/15,931.08 = 7,167.60/x
  3. Step 3: Cross multiply
    10,640.88x = 15,931.08 × 7,167.60
  4. Step 4: Simplify right side
    10,640.88x = 114,187,609.01
  5. Step 5: Solve for x
    x = 114,187,609.01/10,640.88
  6. Step 6: Final answer
    x = 10,731.03

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.