Home / 21,781.40-30,065.10-17,313.08

Finding the Fourth Proportional to 21,781.40, 30,065.10 and 17,313.08

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Solution

The fourth proportional to 21,781.40, 30,065.10 and 17,313.08 is: 23,897.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,781.40 : 30,065.10 = 17,313.08 : x
  2. Step 2: Convert to fraction form
    21,781.40/30,065.10 = 17,313.08/x
  3. Step 3: Cross multiply
    21,781.40x = 30,065.10 × 17,313.08
  4. Step 4: Simplify right side
    21,781.40x = 520,519,481.51
  5. Step 5: Solve for x
    x = 520,519,481.51/21,781.40
  6. Step 6: Final answer
    x = 23,897.43

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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.