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Finding the Fourth Proportional to 19,245.30, 28,869.77 and 7,555.78

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Solution

The fourth proportional to 19,245.30, 28,869.77 and 7,555.78 is: 11,334.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,245.30 : 28,869.77 = 7,555.78 : x
  2. Step 2: Convert to fraction form
    19,245.30/28,869.77 = 7,555.78/x
  3. Step 3: Cross multiply
    19,245.30x = 28,869.77 × 7,555.78
  4. Step 4: Simplify right side
    19,245.30x = 218,133,643.25
  5. Step 5: Solve for x
    x = 218,133,643.25/19,245.30
  6. Step 6: Final answer
    x = 11,334.39

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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.