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Finding the Fourth Proportional to 13,503.85, 18,627.83 and 7,913.77

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Solution

The fourth proportional to 13,503.85, 18,627.83 and 7,913.77 is: 10,916.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,503.85 : 18,627.83 = 7,913.77 : x
  2. Step 2: Convert to fraction form
    13,503.85/18,627.83 = 7,913.77/x
  3. Step 3: Cross multiply
    13,503.85x = 18,627.83 × 7,913.77
  4. Step 4: Simplify right side
    13,503.85x = 147,416,322.65
  5. Step 5: Solve for x
    x = 147,416,322.65/13,503.85
  6. Step 6: Final answer
    x = 10,916.61

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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.