Home / 3,645.12-5,030.16-1,989.12

Finding the Fourth Proportional to 3,645.12, 5,030.16 and 1,989.12

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Solution

The fourth proportional to 3,645.12, 5,030.16 and 1,989.12 is: 2,744.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,645.12 : 5,030.16 = 1,989.12 : x
  2. Step 2: Convert to fraction form
    3,645.12/5,030.16 = 1,989.12/x
  3. Step 3: Cross multiply
    3,645.12x = 5,030.16 × 1,989.12
  4. Step 4: Simplify right side
    3,645.12x = 10,005,591.86
  5. Step 5: Solve for x
    x = 10,005,591.86/3,645.12
  6. Step 6: Final answer
    x = 2,744.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.