Home / 20,389.20-28,125.24-12,832.56

Finding the Fourth Proportional to 20,389.20, 28,125.24 and 12,832.56

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Solution

The fourth proportional to 20,389.20, 28,125.24 and 12,832.56 is: 17,701.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,389.20 : 28,125.24 = 12,832.56 : x
  2. Step 2: Convert to fraction form
    20,389.20/28,125.24 = 12,832.56/x
  3. Step 3: Cross multiply
    20,389.20x = 28,125.24 × 12,832.56
  4. Step 4: Simplify right side
    20,389.20x = 360,918,829.81
  5. Step 5: Solve for x
    x = 360,918,829.81/20,389.20
  6. Step 6: Final answer
    x = 17,701.47

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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.