Home / 18,911.18-28,317.20-13,334.32

Finding the Fourth Proportional to 18,911.18, 28,317.20 and 13,334.32

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Solution

The fourth proportional to 18,911.18, 28,317.20 and 13,334.32 is: 19,966.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,911.18 : 28,317.20 = 13,334.32 : x
  2. Step 2: Convert to fraction form
    18,911.18/28,317.20 = 13,334.32/x
  3. Step 3: Cross multiply
    18,911.18x = 28,317.20 × 13,334.32
  4. Step 4: Simplify right side
    18,911.18x = 377,590,606.30
  5. Step 5: Solve for x
    x = 377,590,606.30/18,911.18
  6. Step 6: Final answer
    x = 19,966.53

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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.