Home / 13,396.18-18,486.57-7,730.86

Finding the Fourth Proportional to 13,396.18, 18,486.57 and 7,730.86

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Solution

The fourth proportional to 13,396.18, 18,486.57 and 7,730.86 is: 10,668.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,396.18 : 18,486.57 = 7,730.86 : x
  2. Step 2: Convert to fraction form
    13,396.18/18,486.57 = 7,730.86/x
  3. Step 3: Cross multiply
    13,396.18x = 18,486.57 × 7,730.86
  4. Step 4: Simplify right side
    13,396.18x = 142,917,084.55
  5. Step 5: Solve for x
    x = 142,917,084.55/13,396.18
  6. Step 6: Final answer
    x = 10,668.50

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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.