Home / 20,415.42-28,173.32-11,465.84

Finding the Fourth Proportional to 20,415.42, 28,173.32 and 11,465.84

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Solution

The fourth proportional to 20,415.42, 28,173.32 and 11,465.84 is: 15,822.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,415.42 : 28,173.32 = 11,465.84 : x
  2. Step 2: Convert to fraction form
    20,415.42/28,173.32 = 11,465.84/x
  3. Step 3: Cross multiply
    20,415.42x = 28,173.32 × 11,465.84
  4. Step 4: Simplify right side
    20,415.42x = 323,030,581.19
  5. Step 5: Solve for x
    x = 323,030,581.19/20,415.42
  6. Step 6: Final answer
    x = 15,822.87

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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.