Home / 13,890.87-19,175.55-8,861.68

Finding the Fourth Proportional to 13,890.87, 19,175.55 and 8,861.68

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Solution

The fourth proportional to 13,890.87, 19,175.55 and 8,861.68 is: 12,233.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,890.87 : 19,175.55 = 8,861.68 : x
  2. Step 2: Convert to fraction form
    13,890.87/19,175.55 = 8,861.68/x
  3. Step 3: Cross multiply
    13,890.87x = 19,175.55 × 8,861.68
  4. Step 4: Simplify right side
    13,890.87x = 169,927,587.92
  5. Step 5: Solve for x
    x = 169,927,587.92/13,890.87
  6. Step 6: Final answer
    x = 12,233.04

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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.