Home / 21,860.82-30,170.61-12,430.26

Finding the Fourth Proportional to 21,860.82, 30,170.61 and 12,430.26

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Solution

The fourth proportional to 21,860.82, 30,170.61 and 12,430.26 is: 17,155.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,860.82 : 30,170.61 = 12,430.26 : x
  2. Step 2: Convert to fraction form
    21,860.82/30,170.61 = 12,430.26/x
  3. Step 3: Cross multiply
    21,860.82x = 30,170.61 × 12,430.26
  4. Step 4: Simplify right side
    21,860.82x = 375,028,526.66
  5. Step 5: Solve for x
    x = 375,028,526.66/21,860.82
  6. Step 6: Final answer
    x = 17,155.28

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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.