Home / 21,859.24-30,157.12-13,461.16

Finding the Fourth Proportional to 21,859.24, 30,157.12 and 13,461.16

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Solution

The fourth proportional to 21,859.24, 30,157.12 and 13,461.16 is: 18,571.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,859.24 : 30,157.12 = 13,461.16 : x
  2. Step 2: Convert to fraction form
    21,859.24/30,157.12 = 13,461.16/x
  3. Step 3: Cross multiply
    21,859.24x = 30,157.12 × 13,461.16
  4. Step 4: Simplify right side
    21,859.24x = 405,949,817.46
  5. Step 5: Solve for x
    x = 405,949,817.46/21,859.24
  6. Step 6: Final answer
    x = 18,571.09

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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.