Home / 18,860.40-28,283.31-8,329.86

Finding the Fourth Proportional to 18,860.40, 28,283.31 and 8,329.86

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Solution

The fourth proportional to 18,860.40, 28,283.31 and 8,329.86 is: 12,491.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,860.40 : 28,283.31 = 8,329.86 : x
  2. Step 2: Convert to fraction form
    18,860.40/28,283.31 = 8,329.86/x
  3. Step 3: Cross multiply
    18,860.40x = 28,283.31 × 8,329.86
  4. Step 4: Simplify right side
    18,860.40x = 235,596,012.64
  5. Step 5: Solve for x
    x = 235,596,012.64/18,860.40
  6. Step 6: Final answer
    x = 12,491.57

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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.