Home / 13,613.06-18,788.04-8,310.95

Finding the Fourth Proportional to 13,613.06, 18,788.04 and 8,310.95

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Solution

The fourth proportional to 13,613.06, 18,788.04 and 8,310.95 is: 11,470.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,613.06 : 18,788.04 = 8,310.95 : x
  2. Step 2: Convert to fraction form
    13,613.06/18,788.04 = 8,310.95/x
  3. Step 3: Cross multiply
    13,613.06x = 18,788.04 × 8,310.95
  4. Step 4: Simplify right side
    13,613.06x = 156,146,461.04
  5. Step 5: Solve for x
    x = 156,146,461.04/13,613.06
  6. Step 6: Final answer
    x = 11,470.34

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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.