Home / 21,781.68-30,054.12-14,239.11

Finding the Fourth Proportional to 21,781.68, 30,054.12 and 14,239.11

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Solution

The fourth proportional to 21,781.68, 30,054.12 and 14,239.11 is: 19,646.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,781.68 : 30,054.12 = 14,239.11 : x
  2. Step 2: Convert to fraction form
    21,781.68/30,054.12 = 14,239.11/x
  3. Step 3: Cross multiply
    21,781.68x = 30,054.12 × 14,239.11
  4. Step 4: Simplify right side
    21,781.68x = 427,943,890.98
  5. Step 5: Solve for x
    x = 427,943,890.98/21,781.68
  6. Step 6: Final answer
    x = 19,646.97

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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.