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Finding the Fourth Proportional to 12,485.88, 17,225.10 and 7,515

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Solution

The fourth proportional to 12,485.88, 17,225.10 and 7,515 is: 10,367.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,485.88 : 17,225.10 = 7,515 : x
  2. Step 2: Convert to fraction form
    12,485.88/17,225.10 = 7,515/x
  3. Step 3: Cross multiply
    12,485.88x = 17,225.10 × 7,515
  4. Step 4: Simplify right side
    12,485.88x = 129,446,626.50
  5. Step 5: Solve for x
    x = 129,446,626.50/12,485.88
  6. Step 6: Final answer
    x = 10,367.44

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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.