Home / 30,653.76-42,286.31-20,585.06

Finding the Fourth Proportional to 30,653.76, 42,286.31 and 20,585.06

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Solution

The fourth proportional to 30,653.76, 42,286.31 and 20,585.06 is: 28,396.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,653.76 : 42,286.31 = 20,585.06 : x
  2. Step 2: Convert to fraction form
    30,653.76/42,286.31 = 20,585.06/x
  3. Step 3: Cross multiply
    30,653.76x = 42,286.31 × 20,585.06
  4. Step 4: Simplify right side
    30,653.76x = 870,465,914.17
  5. Step 5: Solve for x
    x = 870,465,914.17/30,653.76
  6. Step 6: Final answer
    x = 28,396.71

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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.