Home / 20,303.89-28,009.11-13,589.80

Finding the Fourth Proportional to 20,303.89, 28,009.11 and 13,589.80

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Solution

The fourth proportional to 20,303.89, 28,009.11 and 13,589.80 is: 18,747.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,303.89 : 28,009.11 = 13,589.80 : x
  2. Step 2: Convert to fraction form
    20,303.89/28,009.11 = 13,589.80/x
  3. Step 3: Cross multiply
    20,303.89x = 28,009.11 × 13,589.80
  4. Step 4: Simplify right side
    20,303.89x = 380,638,203.08
  5. Step 5: Solve for x
    x = 380,638,203.08/20,303.89
  6. Step 6: Final answer
    x = 18,747.06

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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.