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Finding the Fourth Proportional to 18,709.98, 25,823.10 and 11,156.81

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Solution

The fourth proportional to 18,709.98, 25,823.10 and 11,156.81 is: 15,398.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,709.98 : 25,823.10 = 11,156.81 : x
  2. Step 2: Convert to fraction form
    18,709.98/25,823.10 = 11,156.81/x
  3. Step 3: Cross multiply
    18,709.98x = 25,823.10 × 11,156.81
  4. Step 4: Simplify right side
    18,709.98x = 288,103,291.20
  5. Step 5: Solve for x
    x = 288,103,291.20/18,709.98
  6. Step 6: Final answer
    x = 15,398.38

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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.