Home / 15,471.44-21,369.24-13,401.20

Finding the Fourth Proportional to 15,471.44, 21,369.24 and 13,401.20

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Solution

The fourth proportional to 15,471.44, 21,369.24 and 13,401.20 is: 18,509.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,471.44 : 21,369.24 = 13,401.20 : x
  2. Step 2: Convert to fraction form
    15,471.44/21,369.24 = 13,401.20/x
  3. Step 3: Cross multiply
    15,471.44x = 21,369.24 × 13,401.20
  4. Step 4: Simplify right side
    15,471.44x = 286,373,459.09
  5. Step 5: Solve for x
    x = 286,373,459.09/15,471.44
  6. Step 6: Final answer
    x = 18,509.81

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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.