Home / 20,653.67-28,489.38-18,007.40

Finding the Fourth Proportional to 20,653.67, 28,489.38 and 18,007.40

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Solution

The fourth proportional to 20,653.67, 28,489.38 and 18,007.40 is: 24,839.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,653.67 : 28,489.38 = 18,007.40 : x
  2. Step 2: Convert to fraction form
    20,653.67/28,489.38 = 18,007.40/x
  3. Step 3: Cross multiply
    20,653.67x = 28,489.38 × 18,007.40
  4. Step 4: Simplify right side
    20,653.67x = 513,019,661.41
  5. Step 5: Solve for x
    x = 513,019,661.41/20,653.67
  6. Step 6: Final answer
    x = 24,839.15

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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.