Home / 13,929.08-20,874.66-7,679.72

Finding the Fourth Proportional to 13,929.08, 20,874.66 and 7,679.72

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Solution

The fourth proportional to 13,929.08, 20,874.66 and 7,679.72 is: 11,509.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,929.08 : 20,874.66 = 7,679.72 : x
  2. Step 2: Convert to fraction form
    13,929.08/20,874.66 = 7,679.72/x
  3. Step 3: Cross multiply
    13,929.08x = 20,874.66 × 7,679.72
  4. Step 4: Simplify right side
    13,929.08x = 160,311,543.90
  5. Step 5: Solve for x
    x = 160,311,543.90/13,929.08
  6. Step 6: Final answer
    x = 11,509.13

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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.