Home / 13,479.86-20,218.79-5,160.62

Finding the Fourth Proportional to 13,479.86, 20,218.79 and 5,160.62

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Solution

The fourth proportional to 13,479.86, 20,218.79 and 5,160.62 is: 7,740.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,479.86 : 20,218.79 = 5,160.62 : x
  2. Step 2: Convert to fraction form
    13,479.86/20,218.79 = 5,160.62/x
  3. Step 3: Cross multiply
    13,479.86x = 20,218.79 × 5,160.62
  4. Step 4: Simplify right side
    13,479.86x = 104,341,492.05
  5. Step 5: Solve for x
    x = 104,341,492.05/13,479.86
  6. Step 6: Final answer
    x = 7,740.55

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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.