Home / 12,135.02-18,189.56-8,661.74

Finding the Fourth Proportional to 12,135.02, 18,189.56 and 8,661.74

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Solution

The fourth proportional to 12,135.02, 18,189.56 and 8,661.74 is: 12,983.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,135.02 : 18,189.56 = 8,661.74 : x
  2. Step 2: Convert to fraction form
    12,135.02/18,189.56 = 8,661.74/x
  3. Step 3: Cross multiply
    12,135.02x = 18,189.56 × 8,661.74
  4. Step 4: Simplify right side
    12,135.02x = 157,553,170.14
  5. Step 5: Solve for x
    x = 157,553,170.14/12,135.02
  6. Step 6: Final answer
    x = 12,983.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.