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Finding the Fourth Proportional to 20,435, 28,200.32 and 11,482.50

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Solution

The fourth proportional to 20,435, 28,200.32 and 11,482.50 is: 15,845.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,435 : 28,200.32 = 11,482.50 : x
  2. Step 2: Convert to fraction form
    20,435/28,200.32 = 11,482.50/x
  3. Step 3: Cross multiply
    20,435x = 28,200.32 × 11,482.50
  4. Step 4: Simplify right side
    20,435x = 323,810,174.40
  5. Step 5: Solve for x
    x = 323,810,174.40/20,435
  6. Step 6: Final answer
    x = 15,845.86

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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.