Home / 21,857.24-30,154.36-13,459.16

Finding the Fourth Proportional to 21,857.24, 30,154.36 and 13,459.16

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Solution

The fourth proportional to 21,857.24, 30,154.36 and 13,459.16 is: 18,568.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,857.24 : 30,154.36 = 13,459.16 : x
  2. Step 2: Convert to fraction form
    21,857.24/30,154.36 = 13,459.16/x
  3. Step 3: Cross multiply
    21,857.24x = 30,154.36 × 13,459.16
  4. Step 4: Simplify right side
    21,857.24x = 405,852,355.94
  5. Step 5: Solve for x
    x = 405,852,355.94/21,857.24
  6. Step 6: Final answer
    x = 18,568.33

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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.