Home / 30,714.49-42,399.07-20,648.77

Finding the Fourth Proportional to 30,714.49, 42,399.07 and 20,648.77

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Solution

The fourth proportional to 30,714.49, 42,399.07 and 20,648.77 is: 28,504.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,714.49 : 42,399.07 = 20,648.77 : x
  2. Step 2: Convert to fraction form
    30,714.49/42,399.07 = 20,648.77/x
  3. Step 3: Cross multiply
    30,714.49x = 42,399.07 × 20,648.77
  4. Step 4: Simplify right side
    30,714.49x = 875,488,470.57
  5. Step 5: Solve for x
    x = 875,488,470.57/30,714.49
  6. Step 6: Final answer
    x = 28,504.09

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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.