Home / 20,666.17-28,514.32-13,109.75

Finding the Fourth Proportional to 20,666.17, 28,514.32 and 13,109.75

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Solution

The fourth proportional to 20,666.17, 28,514.32 and 13,109.75 is: 18,088.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,666.17 : 28,514.32 = 13,109.75 : x
  2. Step 2: Convert to fraction form
    20,666.17/28,514.32 = 13,109.75/x
  3. Step 3: Cross multiply
    20,666.17x = 28,514.32 × 13,109.75
  4. Step 4: Simplify right side
    20,666.17x = 373,815,606.62
  5. Step 5: Solve for x
    x = 373,815,606.62/20,666.17
  6. Step 6: Final answer
    x = 18,088.29

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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.