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Finding the Fourth Proportional to 30,357.59, 45,525.44 and 12,828.78

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Solution

The fourth proportional to 30,357.59, 45,525.44 and 12,828.78 is: 19,238.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,357.59 : 45,525.44 = 12,828.78 : x
  2. Step 2: Convert to fraction form
    30,357.59/45,525.44 = 12,828.78/x
  3. Step 3: Cross multiply
    30,357.59x = 45,525.44 × 12,828.78
  4. Step 4: Simplify right side
    30,357.59x = 584,035,854.16
  5. Step 5: Solve for x
    x = 584,035,854.16/30,357.59
  6. Step 6: Final answer
    x = 19,238.54

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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.