Home / 21,085.40-29,121.78-14,359.37

Finding the Fourth Proportional to 21,085.40, 29,121.78 and 14,359.37

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Solution

The fourth proportional to 21,085.40, 29,121.78 and 14,359.37 is: 19,832.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,085.40 : 29,121.78 = 14,359.37 : x
  2. Step 2: Convert to fraction form
    21,085.40/29,121.78 = 14,359.37/x
  3. Step 3: Cross multiply
    21,085.40x = 29,121.78 × 14,359.37
  4. Step 4: Simplify right side
    21,085.40x = 418,170,268.47
  5. Step 5: Solve for x
    x = 418,170,268.47/21,085.40
  6. Step 6: Final answer
    x = 19,832.22

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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.