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Finding the Fourth Proportional to 18,691.58, 28,055.82 and 9,926.47

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Solution

The fourth proportional to 18,691.58, 28,055.82 and 9,926.47 is: 14,899.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,691.58 : 28,055.82 = 9,926.47 : x
  2. Step 2: Convert to fraction form
    18,691.58/28,055.82 = 9,926.47/x
  3. Step 3: Cross multiply
    18,691.58x = 28,055.82 × 9,926.47
  4. Step 4: Simplify right side
    18,691.58x = 278,495,255.56
  5. Step 5: Solve for x
    x = 278,495,255.56/18,691.58
  6. Step 6: Final answer
    x = 14,899.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.