Home / 20,830.05-31,257.27-7,691.58

Finding the Fourth Proportional to 20,830.05, 31,257.27 and 7,691.58

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Solution

The fourth proportional to 20,830.05, 31,257.27 and 7,691.58 is: 11,541.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,830.05 : 31,257.27 = 7,691.58 : x
  2. Step 2: Convert to fraction form
    20,830.05/31,257.27 = 7,691.58/x
  3. Step 3: Cross multiply
    20,830.05x = 31,257.27 × 7,691.58
  4. Step 4: Simplify right side
    20,830.05x = 240,417,792.79
  5. Step 5: Solve for x
    x = 240,417,792.79/20,830.05
  6. Step 6: Final answer
    x = 11,541.87

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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.