Home / 30,480.11-45,720.18-12,937.64

Finding the Fourth Proportional to 30,480.11, 45,720.18 and 12,937.64

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Solution

The fourth proportional to 30,480.11, 45,720.18 and 12,937.64 is: 19,406.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,480.11 : 45,720.18 = 12,937.64 : x
  2. Step 2: Convert to fraction form
    30,480.11/45,720.18 = 12,937.64/x
  3. Step 3: Cross multiply
    30,480.11x = 45,720.18 × 12,937.64
  4. Step 4: Simplify right side
    30,480.11x = 591,511,258.15
  5. Step 5: Solve for x
    x = 591,511,258.15/30,480.11
  6. Step 6: Final answer
    x = 19,406.46

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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.