Home / 13,126.76-18,117.88-8,345.78

Finding the Fourth Proportional to 13,126.76, 18,117.88 and 8,345.78

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Solution

The fourth proportional to 13,126.76, 18,117.88 and 8,345.78 is: 11,519.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,126.76 : 18,117.88 = 8,345.78 : x
  2. Step 2: Convert to fraction form
    13,126.76/18,117.88 = 8,345.78/x
  3. Step 3: Cross multiply
    13,126.76x = 18,117.88 × 8,345.78
  4. Step 4: Simplify right side
    13,126.76x = 151,207,840.55
  5. Step 5: Solve for x
    x = 151,207,840.55/13,126.76
  6. Step 6: Final answer
    x = 11,519.05

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Half 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.