Home / 20,411.55-28,170.09-11,458.53

Finding the Fourth Proportional to 20,411.55, 28,170.09 and 11,458.53

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Solution

The fourth proportional to 20,411.55, 28,170.09 and 11,458.53 is: 15,813.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,411.55 : 28,170.09 = 11,458.53 : x
  2. Step 2: Convert to fraction form
    20,411.55/28,170.09 = 11,458.53/x
  3. Step 3: Cross multiply
    20,411.55x = 28,170.09 × 11,458.53
  4. Step 4: Simplify right side
    20,411.55x = 322,787,821.37
  5. Step 5: Solve for x
    x = 322,787,821.37/20,411.55
  6. Step 6: Final answer
    x = 15,813.98

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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.