Home / 30,639.14-42,301.61-20,444.75

Finding the Fourth Proportional to 30,639.14, 42,301.61 and 20,444.75

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Solution

The fourth proportional to 30,639.14, 42,301.61 and 20,444.75 is: 28,226.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,639.14 : 42,301.61 = 20,444.75 : x
  2. Step 2: Convert to fraction form
    30,639.14/42,301.61 = 20,444.75/x
  3. Step 3: Cross multiply
    30,639.14x = 42,301.61 × 20,444.75
  4. Step 4: Simplify right side
    30,639.14x = 864,845,841.05
  5. Step 5: Solve for x
    x = 864,845,841.05/30,639.14
  6. Step 6: Final answer
    x = 28,226.83

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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.