Home / 13,720.01-18,916.40-11,199.56

Finding the Fourth Proportional to 13,720.01, 18,916.40 and 11,199.56

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Solution

The fourth proportional to 13,720.01, 18,916.40 and 11,199.56 is: 15,441.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,720.01 : 18,916.40 = 11,199.56 : x
  2. Step 2: Convert to fraction form
    13,720.01/18,916.40 = 11,199.56/x
  3. Step 3: Cross multiply
    13,720.01x = 18,916.40 × 11,199.56
  4. Step 4: Simplify right side
    13,720.01x = 211,855,290.20
  5. Step 5: Solve for x
    x = 211,855,290.20/13,720.01
  6. Step 6: Final answer
    x = 15,441.34

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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.