Home / 15,376.20-21,211.38-11,838.12

Finding the Fourth Proportional to 15,376.20, 21,211.38 and 11,838.12

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Solution

The fourth proportional to 15,376.20, 21,211.38 and 11,838.12 is: 16,330.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,376.20 : 21,211.38 = 11,838.12 : x
  2. Step 2: Convert to fraction form
    15,376.20/21,211.38 = 11,838.12/x
  3. Step 3: Cross multiply
    15,376.20x = 21,211.38 × 11,838.12
  4. Step 4: Simplify right side
    15,376.20x = 251,102,861.81
  5. Step 5: Solve for x
    x = 251,102,861.81/15,376.20
  6. Step 6: Final answer
    x = 16,330.62

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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.