Home / 13,279.22-18,325.17-7,690.74

Finding the Fourth Proportional to 13,279.22, 18,325.17 and 7,690.74

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Solution

The fourth proportional to 13,279.22, 18,325.17 and 7,690.74 is: 10,613.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,279.22 : 18,325.17 = 7,690.74 : x
  2. Step 2: Convert to fraction form
    13,279.22/18,325.17 = 7,690.74/x
  3. Step 3: Cross multiply
    13,279.22x = 18,325.17 × 7,690.74
  4. Step 4: Simplify right side
    13,279.22x = 140,934,117.93
  5. Step 5: Solve for x
    x = 140,934,117.93/13,279.22
  6. Step 6: Final answer
    x = 10,613.13

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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.