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Finding the Fourth Proportional to 30,309.60, 45,448.20 and 12,759.60

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Solution

The fourth proportional to 30,309.60, 45,448.20 and 12,759.60 is: 19,132.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,309.60 : 45,448.20 = 12,759.60 : x
  2. Step 2: Convert to fraction form
    30,309.60/45,448.20 = 12,759.60/x
  3. Step 3: Cross multiply
    30,309.60x = 45,448.20 × 12,759.60
  4. Step 4: Simplify right side
    30,309.60x = 579,900,852.72
  5. Step 5: Solve for x
    x = 579,900,852.72/30,309.60
  6. Step 6: Final answer
    x = 19,132.58

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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.