Home / 20,920.62-28,853.49-18,397.38

Finding the Fourth Proportional to 20,920.62, 28,853.49 and 18,397.38

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Solution

The fourth proportional to 20,920.62, 28,853.49 and 18,397.38 is: 25,373.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,920.62 : 28,853.49 = 18,397.38 : x
  2. Step 2: Convert to fraction form
    20,920.62/28,853.49 = 18,397.38/x
  3. Step 3: Cross multiply
    20,920.62x = 28,853.49 × 18,397.38
  4. Step 4: Simplify right side
    20,920.62x = 530,828,619.86
  5. Step 5: Solve for x
    x = 530,828,619.86/20,920.62
  6. Step 6: Final answer
    x = 25,373.47

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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.