Home / 20,078.83-30,123.02-6,931.31

Finding the Fourth Proportional to 20,078.83, 30,123.02 and 6,931.31

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Solution

The fourth proportional to 20,078.83, 30,123.02 and 6,931.31 is: 10,398.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,078.83 : 30,123.02 = 6,931.31 : x
  2. Step 2: Convert to fraction form
    20,078.83/30,123.02 = 6,931.31/x
  3. Step 3: Cross multiply
    20,078.83x = 30,123.02 × 6,931.31
  4. Step 4: Simplify right side
    20,078.83x = 208,791,955.10
  5. Step 5: Solve for x
    x = 208,791,955.10/20,078.83
  6. Step 6: Final answer
    x = 10,398.61

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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.