Home / 28,538.43-39,378.44-17,920.55

Finding the Fourth Proportional to 28,538.43, 39,378.44 and 17,920.55

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Solution

The fourth proportional to 28,538.43, 39,378.44 and 17,920.55 is: 24,727.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,538.43 : 39,378.44 = 17,920.55 : x
  2. Step 2: Convert to fraction form
    28,538.43/39,378.44 = 17,920.55/x
  3. Step 3: Cross multiply
    28,538.43x = 39,378.44 × 17,920.55
  4. Step 4: Simplify right side
    28,538.43x = 705,683,016.45
  5. Step 5: Solve for x
    x = 705,683,016.45/28,538.43
  6. Step 6: Final answer
    x = 24,727.46

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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.