Home / 21,919.36-30,254.40-13,424.32

Finding the Fourth Proportional to 21,919.36, 30,254.40 and 13,424.32

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Solution

The fourth proportional to 21,919.36, 30,254.40 and 13,424.32 is: 18,529.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,919.36 : 30,254.40 = 13,424.32 : x
  2. Step 2: Convert to fraction form
    21,919.36/30,254.40 = 13,424.32/x
  3. Step 3: Cross multiply
    21,919.36x = 30,254.40 × 13,424.32
  4. Step 4: Simplify right side
    21,919.36x = 406,144,747.01
  5. Step 5: Solve for x
    x = 406,144,747.01/21,919.36
  6. Step 6: Final answer
    x = 18,529.04

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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.