Home / 20,143.26-27,816.30-12,985.56

Finding the Fourth Proportional to 20,143.26, 27,816.30 and 12,985.56

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Solution

The fourth proportional to 20,143.26, 27,816.30 and 12,985.56 is: 17,932.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,143.26 : 27,816.30 = 12,985.56 : x
  2. Step 2: Convert to fraction form
    20,143.26/27,816.30 = 12,985.56/x
  3. Step 3: Cross multiply
    20,143.26x = 27,816.30 × 12,985.56
  4. Step 4: Simplify right side
    20,143.26x = 361,210,232.63
  5. Step 5: Solve for x
    x = 361,210,232.63/20,143.26
  6. Step 6: Final answer
    x = 17,932.06

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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.