Home / 13,719.76-18,916.06-11,199.31

Finding the Fourth Proportional to 13,719.76, 18,916.06 and 11,199.31

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Solution

The fourth proportional to 13,719.76, 18,916.06 and 11,199.31 is: 15,441.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,719.76 : 18,916.06 = 11,199.31 : x
  2. Step 2: Convert to fraction form
    13,719.76/18,916.06 = 11,199.31/x
  3. Step 3: Cross multiply
    13,719.76x = 18,916.06 × 11,199.31
  4. Step 4: Simplify right side
    13,719.76x = 211,846,819.92
  5. Step 5: Solve for x
    x = 211,846,819.92/13,719.76
  6. Step 6: Final answer
    x = 15,441.00

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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.