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Finding the Fourth Proportional to 19,103.60, 28,655.40 and 5,252.60

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Solution

The fourth proportional to 19,103.60, 28,655.40 and 5,252.60 is: 7,878.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,103.60 : 28,655.40 = 5,252.60 : x
  2. Step 2: Convert to fraction form
    19,103.60/28,655.40 = 5,252.60/x
  3. Step 3: Cross multiply
    19,103.60x = 28,655.40 × 5,252.60
  4. Step 4: Simplify right side
    19,103.60x = 150,515,354.04
  5. Step 5: Solve for x
    x = 150,515,354.04/19,103.60
  6. Step 6: Final answer
    x = 7,878.90

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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.