Home / 20,885.50-28,822.26-11,454.40

Finding the Fourth Proportional to 20,885.50, 28,822.26 and 11,454.40

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Solution

The fourth proportional to 20,885.50, 28,822.26 and 11,454.40 is: 15,807.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,885.50 : 28,822.26 = 11,454.40 : x
  2. Step 2: Convert to fraction form
    20,885.50/28,822.26 = 11,454.40/x
  3. Step 3: Cross multiply
    20,885.50x = 28,822.26 × 11,454.40
  4. Step 4: Simplify right side
    20,885.50x = 330,141,694.94
  5. Step 5: Solve for x
    x = 330,141,694.94/20,885.50
  6. Step 6: Final answer
    x = 15,807.22

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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.