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Finding the Fourth Proportional to 18,570.98, 25,609.29 and 11,123.30

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Solution

The fourth proportional to 18,570.98, 25,609.29 and 11,123.30 is: 15,338.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,570.98 : 25,609.29 = 11,123.30 : x
  2. Step 2: Convert to fraction form
    18,570.98/25,609.29 = 11,123.30/x
  3. Step 3: Cross multiply
    18,570.98x = 25,609.29 × 11,123.30
  4. Step 4: Simplify right side
    18,570.98x = 284,859,815.46
  5. Step 5: Solve for x
    x = 284,859,815.46/18,570.98
  6. Step 6: Final answer
    x = 15,338.98

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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.