Home / 12,444.60-17,172.90-7,728.78

Finding the Fourth Proportional to 12,444.60, 17,172.90 and 7,728.78

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Solution

The fourth proportional to 12,444.60, 17,172.90 and 7,728.78 is: 10,665.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,444.60 : 17,172.90 = 7,728.78 : x
  2. Step 2: Convert to fraction form
    12,444.60/17,172.90 = 7,728.78/x
  3. Step 3: Cross multiply
    12,444.60x = 17,172.90 × 7,728.78
  4. Step 4: Simplify right side
    12,444.60x = 132,725,566.06
  5. Step 5: Solve for x
    x = 132,725,566.06/12,444.60
  6. Step 6: Final answer
    x = 10,665.31

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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.