Home / 20,881.29-28,799.43-18,358.05

Finding the Fourth Proportional to 20,881.29, 28,799.43 and 18,358.05

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Solution

The fourth proportional to 20,881.29, 28,799.43 and 18,358.05 is: 25,319.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,881.29 : 28,799.43 = 18,358.05 : x
  2. Step 2: Convert to fraction form
    20,881.29/28,799.43 = 18,358.05/x
  3. Step 3: Cross multiply
    20,881.29x = 28,799.43 × 18,358.05
  4. Step 4: Simplify right side
    20,881.29x = 528,701,375.91
  5. Step 5: Solve for x
    x = 528,701,375.91/20,881.29
  6. Step 6: Final answer
    x = 25,319.38

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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.