Home / 15,138.11-20,887.31-9,170.03

Finding the Fourth Proportional to 15,138.11, 20,887.31 and 9,170.03

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Solution

The fourth proportional to 15,138.11, 20,887.31 and 9,170.03 is: 12,652.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,138.11 : 20,887.31 = 9,170.03 : x
  2. Step 2: Convert to fraction form
    15,138.11/20,887.31 = 9,170.03/x
  3. Step 3: Cross multiply
    15,138.11x = 20,887.31 × 9,170.03
  4. Step 4: Simplify right side
    15,138.11x = 191,537,259.32
  5. Step 5: Solve for x
    x = 191,537,259.32/15,138.11
  6. Step 6: Final answer
    x = 12,652.65

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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.