Home / 20,687.96-28,477.28-18,030.75

Finding the Fourth Proportional to 20,687.96, 28,477.28 and 18,030.75

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Solution

The fourth proportional to 20,687.96, 28,477.28 and 18,030.75 is: 24,819.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,687.96 : 28,477.28 = 18,030.75 : x
  2. Step 2: Convert to fraction form
    20,687.96/28,477.28 = 18,030.75/x
  3. Step 3: Cross multiply
    20,687.96x = 28,477.28 × 18,030.75
  4. Step 4: Simplify right side
    20,687.96x = 513,466,716.36
  5. Step 5: Solve for x
    x = 513,466,716.36/20,687.96
  6. Step 6: Final answer
    x = 24,819.60

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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.