Home / 20,885.28-28,822.32-11,454.48

Finding the Fourth Proportional to 20,885.28, 28,822.32 and 11,454.48

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Solution

The fourth proportional to 20,885.28, 28,822.32 and 11,454.48 is: 15,807.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,885.28 : 28,822.32 = 11,454.48 : x
  2. Step 2: Convert to fraction form
    20,885.28/28,822.32 = 11,454.48/x
  3. Step 3: Cross multiply
    20,885.28x = 28,822.32 × 11,454.48
  4. Step 4: Simplify right side
    20,885.28x = 330,144,687.99
  5. Step 5: Solve for x
    x = 330,144,687.99/20,885.28
  6. Step 6: Final answer
    x = 15,807.53

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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.