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Finding the Fourth Proportional to 28,114.40, 42,171.88 and 11,469.98

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Solution

The fourth proportional to 28,114.40, 42,171.88 and 11,469.98 is: 17,205.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,114.40 : 42,171.88 = 11,469.98 : x
  2. Step 2: Convert to fraction form
    28,114.40/42,171.88 = 11,469.98/x
  3. Step 3: Cross multiply
    28,114.40x = 42,171.88 × 11,469.98
  4. Step 4: Simplify right side
    28,114.40x = 483,710,620.16
  5. Step 5: Solve for x
    x = 483,710,620.16/28,114.40
  6. Step 6: Final answer
    x = 17,205.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.