Home / 28,291.85-39,020.22-18,221.12

Finding the Fourth Proportional to 28,291.85, 39,020.22 and 18,221.12

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Solution

The fourth proportional to 28,291.85, 39,020.22 and 18,221.12 is: 25,130.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,291.85 : 39,020.22 = 18,221.12 : x
  2. Step 2: Convert to fraction form
    28,291.85/39,020.22 = 18,221.12/x
  3. Step 3: Cross multiply
    28,291.85x = 39,020.22 × 18,221.12
  4. Step 4: Simplify right side
    28,291.85x = 710,992,111.05
  5. Step 5: Solve for x
    x = 710,992,111.05/28,291.85
  6. Step 6: Final answer
    x = 25,130.63

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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.