Home / 21,127.81-29,151.45-14,427.39

Finding the Fourth Proportional to 21,127.81, 29,151.45 and 14,427.39

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Solution

The fourth proportional to 21,127.81, 29,151.45 and 14,427.39 is: 19,906.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,127.81 : 29,151.45 = 14,427.39 : x
  2. Step 2: Convert to fraction form
    21,127.81/29,151.45 = 14,427.39/x
  3. Step 3: Cross multiply
    21,127.81x = 29,151.45 × 14,427.39
  4. Step 4: Simplify right side
    21,127.81x = 420,579,338.22
  5. Step 5: Solve for x
    x = 420,579,338.22/21,127.81
  6. Step 6: Final answer
    x = 19,906.43

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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.