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Finding the Fourth Proportional to 30,370.60, 45,539.70 and 12,820.60

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Solution

The fourth proportional to 30,370.60, 45,539.70 and 12,820.60 is: 19,224.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,370.60 : 45,539.70 = 12,820.60 : x
  2. Step 2: Convert to fraction form
    30,370.60/45,539.70 = 12,820.60/x
  3. Step 3: Cross multiply
    30,370.60x = 45,539.70 × 12,820.60
  4. Step 4: Simplify right side
    30,370.60x = 583,846,277.82
  5. Step 5: Solve for x
    x = 583,846,277.82/30,370.60
  6. Step 6: Final answer
    x = 19,224.06

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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.