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Finding the Fourth Proportional to 18,993.28, 28,495.68 and 13,457.32

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Solution

The fourth proportional to 18,993.28, 28,495.68 and 13,457.32 is: 20,190.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,993.28 : 28,495.68 = 13,457.32 : x
  2. Step 2: Convert to fraction form
    18,993.28/28,495.68 = 13,457.32/x
  3. Step 3: Cross multiply
    18,993.28x = 28,495.68 × 13,457.32
  4. Step 4: Simplify right side
    18,993.28x = 383,475,484.38
  5. Step 5: Solve for x
    x = 383,475,484.38/18,993.28
  6. Step 6: Final answer
    x = 20,190.06

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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.