Home / 13,135.15-18,129.44-8,354.17

Finding the Fourth Proportional to 13,135.15, 18,129.44 and 8,354.17

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Solution

The fourth proportional to 13,135.15, 18,129.44 and 8,354.17 is: 11,530.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,135.15 : 18,129.44 = 8,354.17 : x
  2. Step 2: Convert to fraction form
    13,135.15/18,129.44 = 8,354.17/x
  3. Step 3: Cross multiply
    13,135.15x = 18,129.44 × 8,354.17
  4. Step 4: Simplify right side
    13,135.15x = 151,456,423.76
  5. Step 5: Solve for x
    x = 151,456,423.76/13,135.15
  6. Step 6: Final answer
    x = 11,530.62

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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.