Home / 21,871.08-30,095.82-21,290.76

Finding the Fourth Proportional to 21,871.08, 30,095.82 and 21,290.76

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Solution

The fourth proportional to 21,871.08, 30,095.82 and 21,290.76 is: 29,297.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,871.08 : 30,095.82 = 21,290.76 : x
  2. Step 2: Convert to fraction form
    21,871.08/30,095.82 = 21,290.76/x
  3. Step 3: Cross multiply
    21,871.08x = 30,095.82 × 21,290.76
  4. Step 4: Simplify right side
    21,871.08x = 640,762,880.62
  5. Step 5: Solve for x
    x = 640,762,880.62/21,871.08
  6. Step 6: Final answer
    x = 29,297.27

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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.