Home / 21,290.66-31,684.68-20,581.17

Finding the Fourth Proportional to 21,290.66, 31,684.68 and 20,581.17

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Solution

The fourth proportional to 21,290.66, 31,684.68 and 20,581.17 is: 30,628.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,290.66 : 31,684.68 = 20,581.17 : x
  2. Step 2: Convert to fraction form
    21,290.66/31,684.68 = 20,581.17/x
  3. Step 3: Cross multiply
    21,290.66x = 31,684.68 × 20,581.17
  4. Step 4: Simplify right side
    21,290.66x = 652,107,526.37
  5. Step 5: Solve for x
    x = 652,107,526.37/21,290.66
  6. Step 6: Final answer
    x = 30,628.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.