Home / 39,420.18-54,399.87-21,514.86

Finding the Fourth Proportional to 39,420.18, 54,399.87 and 21,514.86

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Solution

The fourth proportional to 39,420.18, 54,399.87 and 21,514.86 is: 29,690.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,420.18 : 54,399.87 = 21,514.86 : x
  2. Step 2: Convert to fraction form
    39,420.18/54,399.87 = 21,514.86/x
  3. Step 3: Cross multiply
    39,420.18x = 54,399.87 × 21,514.86
  4. Step 4: Simplify right side
    39,420.18x = 1,170,405,587.07
  5. Step 5: Solve for x
    x = 1,170,405,587.07/39,420.18
  6. Step 6: Final answer
    x = 29,690.52

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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.