Home / 13,578.76-18,732.90-9,379.72

Finding the Fourth Proportional to 13,578.76, 18,732.90 and 9,379.72

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Solution

The fourth proportional to 13,578.76, 18,732.90 and 9,379.72 is: 12,940.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,578.76 : 18,732.90 = 9,379.72 : x
  2. Step 2: Convert to fraction form
    13,578.76/18,732.90 = 9,379.72/x
  3. Step 3: Cross multiply
    13,578.76x = 18,732.90 × 9,379.72
  4. Step 4: Simplify right side
    13,578.76x = 175,709,356.79
  5. Step 5: Solve for x
    x = 175,709,356.79/13,578.76
  6. Step 6: Final answer
    x = 12,940.01

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.