Home / 20,542.80-28,404.36-17,918.40

Finding the Fourth Proportional to 20,542.80, 28,404.36 and 17,918.40

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Solution

The fourth proportional to 20,542.80, 28,404.36 and 17,918.40 is: 24,775.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,542.80 : 28,404.36 = 17,918.40 : x
  2. Step 2: Convert to fraction form
    20,542.80/28,404.36 = 17,918.40/x
  3. Step 3: Cross multiply
    20,542.80x = 28,404.36 × 17,918.40
  4. Step 4: Simplify right side
    20,542.80x = 508,960,684.22
  5. Step 5: Solve for x
    x = 508,960,684.22/20,542.80
  6. Step 6: Final answer
    x = 24,775.62

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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.