Home / 13,605.04-20,406.79-4,117.21

Finding the Fourth Proportional to 13,605.04, 20,406.79 and 4,117.21

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Solution

The fourth proportional to 13,605.04, 20,406.79 and 4,117.21 is: 6,175.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,605.04 : 20,406.79 = 4,117.21 : x
  2. Step 2: Convert to fraction form
    13,605.04/20,406.79 = 4,117.21/x
  3. Step 3: Cross multiply
    13,605.04x = 20,406.79 × 4,117.21
  4. Step 4: Simplify right side
    13,605.04x = 84,019,039.86
  5. Step 5: Solve for x
    x = 84,019,039.86/13,605.04
  6. Step 6: Final answer
    x = 6,175.58

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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.