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Finding the Fourth Proportional to 18,699.94, 25,808.20 and 10,742.15

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Solution

The fourth proportional to 18,699.94, 25,808.20 and 10,742.15 is: 14,825.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,699.94 : 25,808.20 = 10,742.15 : x
  2. Step 2: Convert to fraction form
    18,699.94/25,808.20 = 10,742.15/x
  3. Step 3: Cross multiply
    18,699.94x = 25,808.20 × 10,742.15
  4. Step 4: Simplify right side
    18,699.94x = 277,235,508.55
  5. Step 5: Solve for x
    x = 277,235,508.55/18,699.94
  6. Step 6: Final answer
    x = 14,825.47

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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.