Home / 13,149.68-18,143.22-8,440.32

Finding the Fourth Proportional to 13,149.68, 18,143.22 and 8,440.32

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Solution

The fourth proportional to 13,149.68, 18,143.22 and 8,440.32 is: 11,645.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,149.68 : 18,143.22 = 8,440.32 : x
  2. Step 2: Convert to fraction form
    13,149.68/18,143.22 = 8,440.32/x
  3. Step 3: Cross multiply
    13,149.68x = 18,143.22 × 8,440.32
  4. Step 4: Simplify right side
    13,149.68x = 153,134,582.63
  5. Step 5: Solve for x
    x = 153,134,582.63/13,149.68
  6. Step 6: Final answer
    x = 11,645.50

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Double scale
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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.