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Finding the Fourth Proportional to 18,706.59, 25,818.67 and 11,538.90

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Solution

The fourth proportional to 18,706.59, 25,818.67 and 11,538.90 is: 15,925.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,706.59 : 25,818.67 = 11,538.90 : x
  2. Step 2: Convert to fraction form
    18,706.59/25,818.67 = 11,538.90/x
  3. Step 3: Cross multiply
    18,706.59x = 25,818.67 × 11,538.90
  4. Step 4: Simplify right side
    18,706.59x = 297,919,051.26
  5. Step 5: Solve for x
    x = 297,919,051.26/18,706.59
  6. Step 6: Final answer
    x = 15,925.89

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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.