Home / 13,126.45-18,117.42-8,345.45

Finding the Fourth Proportional to 13,126.45, 18,117.42 and 8,345.45

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Solution

The fourth proportional to 13,126.45, 18,117.42 and 8,345.45 is: 11,518.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,126.45 : 18,117.42 = 8,345.45 : x
  2. Step 2: Convert to fraction form
    13,126.45/18,117.42 = 8,345.45/x
  3. Step 3: Cross multiply
    13,126.45x = 18,117.42 × 8,345.45
  4. Step 4: Simplify right side
    13,126.45x = 151,198,022.74
  5. Step 5: Solve for x
    x = 151,198,022.74/13,126.45
  6. Step 6: Final answer
    x = 11,518.58

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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.