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Finding the Fourth Proportional to 19,103.80, 28,655.72 and 7,425.24

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Solution

The fourth proportional to 19,103.80, 28,655.72 and 7,425.24 is: 11,137.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,103.80 : 28,655.72 = 7,425.24 : x
  2. Step 2: Convert to fraction form
    19,103.80/28,655.72 = 7,425.24/x
  3. Step 3: Cross multiply
    19,103.80x = 28,655.72 × 7,425.24
  4. Step 4: Simplify right side
    19,103.80x = 212,775,598.37
  5. Step 5: Solve for x
    x = 212,775,598.37/19,103.80
  6. Step 6: Final answer
    x = 11,137.87

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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.