Home / 20,877.79-28,794.61-18,354.55

Finding the Fourth Proportional to 20,877.79, 28,794.61 and 18,354.55

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Solution

The fourth proportional to 20,877.79, 28,794.61 and 18,354.55 is: 25,314.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,877.79 : 28,794.61 = 18,354.55 : x
  2. Step 2: Convert to fraction form
    20,877.79/28,794.61 = 18,354.55/x
  3. Step 3: Cross multiply
    20,877.79x = 28,794.61 × 18,354.55
  4. Step 4: Simplify right side
    20,877.79x = 528,512,108.98
  5. Step 5: Solve for x
    x = 528,512,108.98/20,877.79
  6. Step 6: Final answer
    x = 25,314.56

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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.