Home / 30,431.19-45,634.32-12,649.68

Finding the Fourth Proportional to 30,431.19, 45,634.32 and 12,649.68

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Solution

The fourth proportional to 30,431.19, 45,634.32 and 12,649.68 is: 18,969.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,431.19 : 45,634.32 = 12,649.68 : x
  2. Step 2: Convert to fraction form
    30,431.19/45,634.32 = 12,649.68/x
  3. Step 3: Cross multiply
    30,431.19x = 45,634.32 × 12,649.68
  4. Step 4: Simplify right side
    30,431.19x = 577,259,545.02
  5. Step 5: Solve for x
    x = 577,259,545.02/30,431.19
  6. Step 6: Final answer
    x = 18,969.34

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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.