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Finding the Fourth Proportional to 12,485.40, 17,222.48 and 8,007.52

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Solution

The fourth proportional to 12,485.40, 17,222.48 and 8,007.52 is: 11,045.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,485.40 : 17,222.48 = 8,007.52 : x
  2. Step 2: Convert to fraction form
    12,485.40/17,222.48 = 8,007.52/x
  3. Step 3: Cross multiply
    12,485.40x = 17,222.48 × 8,007.52
  4. Step 4: Simplify right side
    12,485.40x = 137,909,353.05
  5. Step 5: Solve for x
    x = 137,909,353.05/12,485.40
  6. Step 6: Final answer
    x = 11,045.65

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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.