Home / 20,276.91-30,417.16-7,129.39

Finding the Fourth Proportional to 20,276.91, 30,417.16 and 7,129.39

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Solution

The fourth proportional to 20,276.91, 30,417.16 and 7,129.39 is: 10,694.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,276.91 : 30,417.16 = 7,129.39 : x
  2. Step 2: Convert to fraction form
    20,276.91/30,417.16 = 7,129.39/x
  3. Step 3: Cross multiply
    20,276.91x = 30,417.16 × 7,129.39
  4. Step 4: Simplify right side
    20,276.91x = 216,855,796.33
  5. Step 5: Solve for x
    x = 216,855,796.33/20,276.91
  6. Step 6: Final answer
    x = 10,694.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.