Home / 20,925.66-31,390.50-6,885.78

Finding the Fourth Proportional to 20,925.66, 31,390.50 and 6,885.78

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Solution

The fourth proportional to 20,925.66, 31,390.50 and 6,885.78 is: 10,329.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,925.66 : 31,390.50 = 6,885.78 : x
  2. Step 2: Convert to fraction form
    20,925.66/31,390.50 = 6,885.78/x
  3. Step 3: Cross multiply
    20,925.66x = 31,390.50 × 6,885.78
  4. Step 4: Simplify right side
    20,925.66x = 216,148,077.09
  5. Step 5: Solve for x
    x = 216,148,077.09/20,925.66
  6. Step 6: Final answer
    x = 10,329.33

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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.