Home / 13,781.04-20,668.21-6,378.45

Finding the Fourth Proportional to 13,781.04, 20,668.21 and 6,378.45

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Solution

The fourth proportional to 13,781.04, 20,668.21 and 6,378.45 is: 9,566.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,781.04 : 20,668.21 = 6,378.45 : x
  2. Step 2: Convert to fraction form
    13,781.04/20,668.21 = 6,378.45/x
  3. Step 3: Cross multiply
    13,781.04x = 20,668.21 × 6,378.45
  4. Step 4: Simplify right side
    13,781.04x = 131,831,086.50
  5. Step 5: Solve for x
    x = 131,831,086.50/13,781.04
  6. Step 6: Final answer
    x = 9,566.12

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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.