Home / 20,664.85-28,514.95-13,965.07

Finding the Fourth Proportional to 20,664.85, 28,514.95 and 13,965.07

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Solution

The fourth proportional to 20,664.85, 28,514.95 and 13,965.07 is: 19,270.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,664.85 : 28,514.95 = 13,965.07 : x
  2. Step 2: Convert to fraction form
    20,664.85/28,514.95 = 13,965.07/x
  3. Step 3: Cross multiply
    20,664.85x = 28,514.95 × 13,965.07
  4. Step 4: Simplify right side
    20,664.85x = 398,213,272.80
  5. Step 5: Solve for x
    x = 398,213,272.80/20,664.85
  6. Step 6: Final answer
    x = 19,270.08

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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.