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Finding the Fourth Proportional to 18,116, 25,041.92 and 15,114.32

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Solution

The fourth proportional to 18,116, 25,041.92 and 15,114.32 is: 20,892.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,116 : 25,041.92 = 15,114.32 : x
  2. Step 2: Convert to fraction form
    18,116/25,041.92 = 15,114.32/x
  3. Step 3: Cross multiply
    18,116x = 25,041.92 × 15,114.32
  4. Step 4: Simplify right side
    18,116x = 378,491,592.29
  5. Step 5: Solve for x
    x = 378,491,592.29/18,116
  6. Step 6: Final answer
    x = 20,892.67

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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.