Home / 30,260.80-45,408.96-12,729.28

Finding the Fourth Proportional to 30,260.80, 45,408.96 and 12,729.28

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Solution

The fourth proportional to 30,260.80, 45,408.96 and 12,729.28 is: 19,101.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,260.80 : 45,408.96 = 12,729.28 : x
  2. Step 2: Convert to fraction form
    30,260.80/45,408.96 = 12,729.28/x
  3. Step 3: Cross multiply
    30,260.80x = 45,408.96 × 12,729.28
  4. Step 4: Simplify right side
    30,260.80x = 578,023,366.35
  5. Step 5: Solve for x
    x = 578,023,366.35/30,260.80
  6. Step 6: Final answer
    x = 19,101.39

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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.