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Finding the Fourth Proportional to 12,479.66, 17,220.30 and 7,444.48

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Solution

The fourth proportional to 12,479.66, 17,220.30 and 7,444.48 is: 10,272.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,479.66 : 17,220.30 = 7,444.48 : x
  2. Step 2: Convert to fraction form
    12,479.66/17,220.30 = 7,444.48/x
  3. Step 3: Cross multiply
    12,479.66x = 17,220.30 × 7,444.48
  4. Step 4: Simplify right side
    12,479.66x = 128,196,178.94
  5. Step 5: Solve for x
    x = 128,196,178.94/12,479.66
  6. Step 6: Final answer
    x = 10,272.41

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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.