Home / 12,254.80-16,911.56-9,115.60

Finding the Fourth Proportional to 12,254.80, 16,911.56 and 9,115.60

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Solution

The fourth proportional to 12,254.80, 16,911.56 and 9,115.60 is: 12,579.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,254.80 : 16,911.56 = 9,115.60 : x
  2. Step 2: Convert to fraction form
    12,254.80/16,911.56 = 9,115.60/x
  3. Step 3: Cross multiply
    12,254.80x = 16,911.56 × 9,115.60
  4. Step 4: Simplify right side
    12,254.80x = 154,159,016.34
  5. Step 5: Solve for x
    x = 154,159,016.34/12,254.80
  6. Step 6: Final answer
    x = 12,579.48

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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.